XF 2.3 #1 post = article, can't use inline edit

[Robert9]

I'm aware that finding a solution off the cuff is unlikely, but perhaps someone has an idea of the direction I should look. I updated a customer forum to 2.3.2. Now there’s the following strange behavior:

I go to Post #2, click on Edit, and everything is normal.I go to Post #1, an Article, click on Edit, and absolutely nothing happens.If I open Edit in a new window, it works.

I suspect that something might be wrong with the JS. But what could it be?

 

[Robert9]

Changed thread type to discussion.
Thread is still thread_type article
cant edit

Thread to thread_type discussion
cant edit

=> there is a problem with the first post
a) code different
b) addons

Next step, deactivate all addons

 

[Robert9]

All addons deactivated, edit works.
Looking for an addon that changes thread or first post.