Yeah... In order to get that to work, I would need to make a diff_match_patch for all in background collected permlinks, which possibly would have a huge impact on the loading performance at page startup, especially for accounts with much ongoing activity.
I'm not sure, if I can fix that without taking a hit on performance, but I will try. Maybe there should be an option in Settings to be able to deactivate it in case of slow loading times.
I've seen this feature/bug in other contexts; had to force to just look at date created and ignore last_update. Of course, this means one can't see any edits, but I think better than seeing a disconnected edit :-) and saves on processing.