Actually this happens when someone has clicked inside a quick reply or reply box. Otherwise, it continues to refresh fine.

This also happens all the time with feedback/comments. Those always break the AJAX refresh when change_detection returns 1, and also fails to refresh the changes.

For the forums, it will successfully refresh on a change and continue checking for changes until you click in the quick reply box.

Additional info: I'm using custom change_detection hooks for the topicview and for the feedback. Only one for tickets currently exists, and that one is glitchy as well. The tickets change detection always returns 1, meaning it always thinks there's a change.

I am trying to follow this, but the original report was corrected in a note, then it is talking about custom code, while the only non-custom code involved apparently does something different to the original report which I can't reproduce.

"Actually this happens when someone has clicked inside a quick reply or reply box. Otherwise, it continues to refresh fine.
" - this is by design, so that replies are not lost.

I think probably there was no bug here, but an unneeded 'fix' in #2850 actually caused the issue.