Yes. This title changing business is infuriating.
Edit: I'm tempted to write a bot that will catch title changes and post the original title as a comment in the thread automatically.
Though, I'd be in favor of you trying and seeing the result. My test was limited and short lived so it may not be indicative of the full community.
As for how this happens, I don't know? Is this a from moderators import title_checking ... But then Arc is more functional so maybe it is done in code?