Hello,
I already inquired about this issue two weeks ago and I was sent a link about a user with the same concern. The AVAST Password is still inaccessible on my Samsung. I thought the dev were working on the issue? This has been an issue for a month on my end.
Dev-Info: V1.6.2 has been released. Rollout is staged (currently on 20% of users) so you might not get it immediately.