Clicked side bar, see
This is already found and reported.
I previously had this issue. It only affects admins who have the rights to change the order of the pinned topics which is why it's unlikely others can't reproduce on the OPs site.
However since 1.7 (could be Chrome 64) I no longer have the problem.
Thanks, @baris! Happy to help.
I'm running 0.5.3 stable. Ok I will try tonight when I'll be at home.
Edit: @julian I tried to disable plugins, it's still doing the same thing unfortunately. The quick solution that I've found for the moment is to deactivate the upload of a thumbnail for topics.
I've tested on IOS 8.4, 8.4.1, and 9.0.2 @pitaj
Haha. I'm planning a refactor of the menu 🙂