Progress bar not respecting --output json

[spowelljr]

Reproduce:

$ minikube delete --all --purge
$ minikube --download-only --output json # --download-only not required, just a shorter way to see the problem
{"specversion":"1.0","id":"66aee6f2-af85-4dde-9028-d90c51274d26","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.step","datacontenttype":"application/json","data":{"currentstep":"0","message":"minikube v1.28.0 on Darwin 13.0.1 (arm64)","name":"Initial Minikube Setup","totalsteps":"19"}}
{"specversion":"1.0","id":"f66c2c39-a23a-4929-b53e-0d8b9909fc27","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.step","datacontenttype":"application/json","data":{"currentstep":"1","message":"Automatically selected the docker driver. Other choices: ssh, qemu2 (experimental)","name":"Selecting Driver","totalsteps":"19"}}
{"specversion":"1.0","id":"00155e05-8a50-4c1d-963e-f24062dcf79c","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.info","datacontenttype":"application/json","data":{"message":"Using Docker Desktop driver with root privileges"}}
{"specversion":"1.0","id":"97d4e6fa-ea41-4bb1-af7c-e34ec8ac4878","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.step","datacontenttype":"application/json","data":{"currentstep":"3","message":"Starting control plane node minikube in cluster minikube","name":"Starting Node","totalsteps":"19"}}
{"specversion":"1.0","id":"69a6b66c-bc12-48e0-8ded-f1dac7d061a5","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.step","datacontenttype":"application/json","data":{"currentstep":"5","message":"Pulling base image ...","name":"Pulling Base Image","totalsteps":"19"}}
{"specversion":"1.0","id":"26d23bbe-dba9-4da5-8fec-3c92162d1ff2","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.step","datacontenttype":"application/json","data":{"currentstep":"5","message":"Downloading Kubernetes v1.25.3 preload ...","name":"Pulling Base Image","totalsteps":"19"}}
{"specversion":"1.0","id":"a9752a73-cd2f-4565-8d62-15d5a90b099e","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download","datacontenttype":"application/json","data":{"artifact":"preloaded-images-k8s-v18-v1.25.3-docker-overlay2-arm64.tar.lz4","currentstep":"5","totalsteps":"19"}}
    > gcr.io/k8s-minikube/kicbase...:  6.34 MiB / 347.54 MiB  1.83% 10.59 MiB p{"specversion":"1.0","id":"5a5dbe90-e1c1-4a3d-8c68-8b97f2216cf4","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download.progress","datacontenttype":"application/json","data":{"artifact":"preloaded-images-k8s-v18-v1.25.3-docker-overlay2-arm64.tar.lz4","currentstep":"5","progress":"0.06765009779836205","totalsteps":"19"}}
    > gcr.io/k8s-minikube/kicbase...:  25.97 MiB / 347.54 MiB  7.47% 11.90 MiB {"specversion":"1.0","id":"32b3231e-152a-4eb8-8517-38cbee741aa2","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download.progress","datacontenttype":"application/json","data":{"artifact":"preloaded-images-k8s-v18-v1.25.3-docker-overlay2-arm64.tar.lz4","currentstep":"5","progress":"0.16846773814581306","totalsteps":"19"}}
    > gcr.io/k8s-minikube/kicbase...:  25.97 MiB / 347.54 MiB  7.47% 10.52 MiB {"specversion":"1.0","id":"dc3969d2-d948-42ce-991a-522d6ff64a08","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download.progress","datacontenttype":"application/json","data":{"artifact":"preloaded-images-k8s-v18-v1.25.3-docker-overlay2-arm64.tar.lz4","currentstep":"5","progress":"0.34341313144438507","totalsteps":"19"}}
    > gcr.io/k8s-minikube/kicbase...:  25.97 MiB / 347.54 MiB  7.47% 9.21 MiB p{"specversion":"1.0","id":"e4826970-5865-47a4-b2d9-6db586d18b51","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download.progress","datacontenttype":"application/json","data":{"artifact":"preloaded-images-k8s-v18-v1.25.3-docker-overlay2-arm64.tar.lz4","currentstep":"5","progress":"0.4894769495129868","totalsteps":"19"}}
    > gcr.io/k8s-minikube/kicbase...:  25.99 MiB / 347.54 MiB  7.48% 8.61 MiB p{"specversion":"1.0","id":"ef43addc-495b-40d9-a5cf-65f3ca33b993","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download.progress","datacontenttype":"application/json","data":{"artifact":"preloaded-images-k8s-v18-v1.25.3-docker-overlay2-arm64.tar.lz4","currentstep":"5","progress":"0.5522566299032594","totalsteps":"19"}}
    > gcr.io/k8s-minikube/kicbase...:  33.99 MiB / 347.54 MiB  9.78% 8.25 MiB p{"specversion":"1.0","id":"32aea89b-53ea-48d5-919c-19432156930c","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download.progress","datacontenttype":"application/json","data":{"artifact":"preloaded-images-k8s-v18-v1.25.3-docker-overlay2-arm64.tar.lz4","currentstep":"5","progress":"0.6760626404168925","totalsteps":"19"}}
    > gcr.io/k8s-minikube/kicbase...:  49.91 MiB / 347.54 MiB  14.36% 9.03 MiB {"specversion":"1.0","id":"b1bcb827-393b-432d-9022-a72b7c9a4fc7","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download.progress","datacontenttype":"application/json","data":{"artifact":"preloaded-images-k8s-v18-v1.25.3-docker-overlay2-arm64.tar.lz4","currentstep":"5","progress":"0.8055183351239094","totalsteps":"19"}}
    > gcr.io/k8s-minikube/kicbase...:  58.73 MiB / 347.54 MiB  16.90% 8.45 MiB {"specversion":"1.0","id":"af2c49ef-888d-4be3-a0c6-011600e8fac5","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download.progress","datacontenttype":"application/json","data":{"artifact":"preloaded-images-k8s-v18-v1.25.3-docker-overlay2-arm64.tar.lz4","currentstep":"5","progress":"0.9244539282294529","totalsteps":"19"}}
    > gcr.io/k8s-minikube/kicbase...:  67.15 MiB / 347.54 MiB  19.32% 8.98 MiB {"specversion":"1.0","id":"413e1f64-47d1-40fb-b51e-07f7f7d729d4","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download.progress","datacontenttype":"application/json","data":{"artifact":"preloaded-images-k8s-v18-v1.25.3-docker-overlay2-arm64.tar.lz4","currentstep":"5","progress":"1","totalsteps":"19"}}
{"specversion":"1.0","id":"0d741841-8aaa-4165-b315-bb576a8af88b","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download.progress","datacontenttype":"application/json","data":{"artifact":"preloaded-images-k8s-v18-v1.25.3-docker-overlay2-arm64.tar.lz4","currentstep":"5","progress":"1","totalsteps":"19"}}
    > gcr.io/k8s-minikube/kicbase...:  88.94 MiB / 347.54 MiB  25.59% 10.34 MiB{"specversion":"1.0","id":"94dbf195-4a4e-4940-946d-8e600775d440","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download","datacontenttype":"application/json","data":{"artifact":"kubectl.sha256","currentstep":"5","totalsteps":"19"}}
{"specversion":"1.0","id":"49640433-74eb-435d-9d4e-e218cbd32701","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download.progress","datacontenttype":"application/json","data":{"artifact":"kubectl.sha256","currentstep":"5","progress":"1","totalsteps":"19"}}
{"specversion":"1.0","id":"c10225df-22be-412d-ab88-86c62253acad","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download.progress","datacontenttype":"application/json","data":{"artifact":"kubectl.sha256","currentstep":"5","progress":"1","totalsteps":"19"}}
    > gcr.io/k8s-minikube/kicbase...:  88.94 MiB / 347.54 MiB  25.59% 10.34 MiB{"specversion":"1.0","id":"d13e1c41-2c6b-4166-9536-b961247ad6fd","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download","datacontenttype":"application/json","data":{"artifact":"kubectl","currentstep":"5","totalsteps":"19"}}
    > gcr.io/k8s-minikube/kicbase...:  106.35 MiB / 347.54 MiB  30.60% 10.88 Mi{"specversion":"1.0","id":"5760442b-3d0c-4b95-907b-6fe7259215ee","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download.progress","datacontenttype":"application/json","data":{"artifact":"kubectl","currentstep":"5","progress":"0.45898446533215576","totalsteps":"19"}}
    > gcr.io/k8s-minikube/kicbase...:  112.65 MiB / 347.54 MiB  32.41% 10.85 Mi{"specversion":"1.0","id":"d387ef99-2f56-46b5-8d39-ea69581f9e60","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download.progress","datacontenttype":"application/json","data":{"artifact":"kubectl","currentstep":"5","progress":"1","totalsteps":"19"}}
{"specversion":"1.0","id":"ba3bbc96-3d1f-4162-9fb3-8549e0f1987f","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.download.progress","datacontenttype":"application/json","data":{"artifact":"kubectl","currentstep":"5","progress":"1","totalsteps":"19"}}
    > gcr.io/k8s-minikube/kicbase...:  347.54 MiB / 347.54 MiB  100.00% 13.04 M
{"specversion":"1.0","id":"fb0f0658-7a59-4b1e-8945-dab4fd9001df","source":"https://minikube.sigs.k8s.io/","type":"io.k8s.sigs.minikube.step","datacontenttype":"application/json","data":{"currentstep":"5","message":"Download complete!","name":"Pulling Base Image","totalsteps":"19"}}

Want:
Stream of JSON objects

Get:
Malformed stream containing progress bars