Bitrix. Stopped grouping tabs in the admin panel. How to be?

Question

1C-Bitrix

For reasons unknown to me, tabs in the admin panel of the product are no longer grouped, there are no errors in the debugger, all scripts are loaded. I can't figure out what the problem is. Which way to look?

I also tried to restore a backup of the time when everything worked. On top of the working version, I loaded the backup of the database and after a while the problem repeated

Answer 1

This is not related to the mechanics of Bitrix - a purely interface solution.
It all depends on the user settings and this can be changed: