XF 2.3 Cannot merge posts / move threads using inline moderation

[Saarbruecken]

Something strange is going on and I cannot figure it out. I have the following Super Moderator permissions (see below), however when I select two posts using Inline Moderation and trying to merge those two posts, the Inline Moderation bar below only offers me Deselect all. Same when I select multiple threads and try to move them to a different forum, the Inline Moderation bar below only offers me Deselect all.

What am I doing wrong? I am using XenForo for almost a decade now and I never felt so stupid. Moving an individual thread works fine, when I use the More Options menu instead of Inline Moderation.

 

[Saarbruecken]

Apparently the problem is related to private nodes, but I still cannot figure out, which permissions must be applied in order to get inline moderation working again.