I recently had to restore my iPhone.
One of the tasks afterwards was to reconnect the forums in the Discourse Hub app. I had 5 forums to reconnect.
After authorizing the first connect it seemed like the process was complete, so I tapped the second connect button. At this point I had to deal with pages from both connect processes which was unexpected and confusing.
I think it would make sense for other buttons to be disabled once a connect is in progress.
ps: I was on cell signal at the time so loading times were longer than I usually see.
iPhone SE 2020