When using a physical mouse to select a section from the table of contents, the click event seems to get propagated down to the WebView, which can cause links to get "clicked" and have undesirable side-effects, such as invoking a link-preview, or entering the image gallery.
Edit from original poster: Sometimes, it also ends up being sent to the wrong entry as well. I thought I was wrong about this after I tested for it and it didn't happen, but I have just experienced this additional bug again.
[Original text:]
I sometimes use a keyboard and mouse on my phone, and the Wikipedia app, in many ways, has the best support for this out of all the apps I have used.
There is one aspect, however, which I believe is a fairly recent change, where the support is not nearly as good: clicking on an article section will not take one to it when the article section list is scrolled down.
This is a nuiscience, and it is a shame that this bug exists while the rest of the UX works so well.
Please pardon me if I put this in the wrong section; this bug platform is new to me.