When grouping several itemtypes using the ITEMTYPECAT authorised value, the grouping works, as seen on the advanced search page, but it doesn't display the correct description from the authorised value, but is still using one of the itemtype descriptions. So far tested on 16.11.x Used to work with 3.22.x - so this is a regression
Hm, figured it out. This appears when one of your itemtypes has the same code ad the ITEMTYPECAT category used. Still a bug, but changing severity and title.
*** This bug has been marked as a duplicate of bug 21090 ***