I'm not sure if this is an issue with the vue wrapper components or the core apexcharts lib, but there's a bug nevertheless. So feel free to move this issue to the other repo.
See the example here:
https://codesandbox.io/s/z21243ppjl
Chart updates correctly when shuffle data button is hit, then go to HelloWorld.vue and uncomment the stroke.show = false flag and shuffle the data again.
Excellent lib, only issue i've found so far!