I experienced a very strange bug that made my phone USELESS for a while.
I have the Latest firmware/rom A9100ZCU1AQH1 and used the latest TWRP twrp_3.0.2-1_sm-a910_a9100_7217
I did NOT use the no-verity-no-encrypt_ashyx and instead of SuperSu I used the latest Magisk V14 with the latest Magisk Manager 5.4.3
I have set up a screen lock password because I use the fingerprint.
I have Google Photos installed, latest version, used the upper left button and selected "Add partner account" and went to the selection and at the end you have to enter the Google Account Password in order to be able to share the photos and it DID not accepted my password and I introduced it till it gave me 1 minut timeout... then tried it again 2 more times and gave up.... After a few days I restarted the phone and at restart it asked for my screen lock password as usual... entered it and SURPRISE, is said that it is wrong, desperately I entered it till my phone got locked for good
The ONLY way I could unlock my phone was when I got home, entered google device manager on the web from my computer... locked the phone with a phone and message... used the locked phone to call someone... and ONLY then it accepted my screen lock password.
This combination might be really bad if you don't have access to a computer !
Later edit : It turns out that it needed the SCREEN lock password for confirmation not Google account password... Even if I tried the same app from other phones (Huawei that also has lock screen password and fingerprint enabled) it asks for Google account password