kate stopped warning about changed files (but only C++ files)

So if i open a README with both kate and vim and change it from vim, kate will say

"File has changed, want to reload, overwrite, ignore"

But if I do the same with Splash.cc half of the times it won't tell me that there have been changes.

Has anything been changed recently in that area that may have caused such a regression?

I can bisect, kate or ktextedit?

Cheers,
  Albert