moving our projeqtor instance to docker and updating from 10.0.2 to 10.0.3

First it is a very bas idea to have technical migration (move to docker) and functional migration at the same time : you won't know where issues come from.
Then, your issues are DB issues, it seems you did not crrectly reimport database to docker (possibly comments on columns have not been imported)
 

Thank you for the quick answer. You're right, switching multiple things at once was a bad idea, but we can't move back now since it's already in use.

The database did transfer the comments, but I noticed that the data types are different between the current system and a new installation. Many numeric columns are using bigint or integer instead of numeric. I have created a script with the schema diff tool in pgadmin and tried it on a copy of our current system. The checkboxes have returned and are now automatically set when the status changes. I'm going to apply the script to our main system tomorrow.

The settings in the kanban view are still not persistent, so I guess they might have an issue with write protection or file ownership. Can you tell me where they are saved?

Definition of kanbans are stored in table kanban, in jSon format in column param

Changing the column types fixed most of the issues we had, now we have just one remaining.

I looked into the database to find where the parameters for kanban are stored, specifically the 'show work on elements'.
For my user it is stored in parameter with parametercode kanbanSeeWork8 and value null.
When I log in the checkbox is enabled and work is shown on all elements.
Changing the value of the checkbox correctly writes null or 1 into the database and updates the display, but it doesn't read the value on login.