I tried creating a new exercise with a table and realized that "locked_cells" no longer works.
I also tried to use "table_locked_cells" since I found it online, but that seems to be the old key.
I looked back to several questions I had created before and realized that the questions there also do not have any locked cells anymore.
This is dangerous in some exercises since the full result is analyzed (so students can simply answer their questions by themselves).
Is this issue related to the Moodle 4 update?
I have testet it on two differnt moodles.