BTRFS is a nice filesystem, except when you are forced to hard reset the system twice in a row. In that case, all recently made changes to the files on the filesystem are broken in one way or another. Among theese there is always the Linux registry, dconf.
So after the computer hard restart, you are left in a state of the broken dconf - all values are forced to the defaults, and you are banned from doing any modification to them.
Removing the whole
/home/$USER folder and re-creating it from scratch fixes the problem. But that takes a huge amount of time and loses even more data.
I wonder, if there is a better way to repair or reset the dconf. Preferably with the option to inspect the old values.
I expect, that there is some backup of dconf settings, just like in Windows word.