Thank you for the feedback @9d9.
The issue you’re seeing with the app not launching is puzzling, and has not been reported anywhere else, as far as I know. Would you mind starting a new thread on the snapcraft forum to investigate that specific issue?
Regarding passwords, this is because the password-manager-service interface is not auto-connected. This is indeed bad user experience, and I am looking into options to solve this.
Please note that the candidate/from-source
channel doesn’t exist anymore (the chromium snap is now always built from source), you should switch to the stable channel.