stored generated columns are not properly updated after update

Stored generated columns depending on other columns:

• are properly updated after these other columns get updated by a simple "UPDATE" statement;
• are NOT updated after these other columns get updated by a "CASCADE" operation caused by a foreign key constraint.

The latter is apparently a bug. With a table with almost 2300 rows, after several updates caused by "cascade" foreign key constraints which I don't even remember, I am left with no other option than to remove the generated columns and add them again - in order to make MariaDB notice the changes in foreign keys. IMO it shouldn't be so.