Matrix outputs not merged

[bep]

System information

go install github.com/nektos/act@latest                                               
go: downloading github.com/nektos/act v0.2.25
Darwin bep-mac14.local 21.1.0 Darwin Kernel Version 21.1.0: Wed Oct 13 17:33:01 PDT 2021; root:xnu-8019.41.5~1/RELEASE_ARM64_T6000 arm64

Expected behaviour

As on GItHub I expect it to echo:

{
  "v1var": "v1",
  "v2var": "v2"
}

Actual behaviour

It prints:

{
   "v1var": "",
   "v2var": "v2"
}

Workflow and/or repository

https://github.com/bep/githubactionstest/blob/main/.github/workflows/blank.yml

[github-actions]

Issue is stale and will be closed in 14 days unless there is new activity

[bep]

That's an aggressive stale bot config 👎