I am using version 1.4.6 in Ubuntu 18:10, via AppImage.
I have the following issue, that I am able to replicate at any time.
If I launch the desktop app and enter the correct password, everything works as expected.
Once I enter a wrong password, then I am not able to unlock the drive anymore, even with the correct password.
I can solve the problem by just re-launching the app, and entering the correct password.
Please let me know if I can help to debug the issue. Thanks!