I’m checking more details with the engineering team. However, I was able to replicate the issue, my changes to the custom capability weren’t recognized by the driver, but after some time, it seems it updated by itself
If you want to see the change immediately, you need to delete the driver package and create it again, I suggest using a new packageKey.
This caused me significant angst. I know edge is evolving and beta and this issue is mentioned in the community, I guess it seems to be it would be possible for the engineering team to share their outstanding bugs or something.
Sorry to whine, but for someone coming up the learning curve, this really hurts.