Steps to replicate the issue (include links if applicable):
- start a suggested section image task on desktop with the onboarding-needed user preference (growthexperiments-addsectionimage-onboarding) enabled
- press Esc on the last onboarding screen
What happens?:
The "Are you sure you want to leave?" dialog comes up. The page becomes unresponsive (due to some overlay z-index confusion, I think). No error is logged.
What should have happened instead?:
Onboarding is skipped. (This does happen on onboarding screens other than the last.)
Software version (skip for WMF-hosted wikis like Wikipedia):
Tested locally on master.
Other information (browser name/version, screenshots, etc.):
Didn't test other task types but I expect it isn't actually specific to section images.