Hi,

I open a new post to keep issues apart and be able to find them for others.

The issue:
1) sometimes I open an item. The view shows some items overlapping.

2) In this case I am not able to edit the item. I cannot change author or texts.
-> it is exactly like in this post (Shari 3 days ago, not the 5 years ago issue), the same error on the screenshot appears for me.
www.joomlaworks.net/forum/k2-en/40835-k2-backend-cannot-edit-items

3) After I log out and time passes by, the item editing works ...

4) It is a freshly installed J3 site, except a template, k2, Akeeba admin tools, it is only Joomla. So I tend to exclude a third party.
PhP version is 7.4.

Any idea is welcome.

a) attached is the screenshot

b) There is Zenkit (Joomlabamboo) installed now. But, the error appears with and without. I found out that sometimes it is enough to refresh the page in the browser with an open item. Then it works again.

Thanks a lot