Sometimes, in a situation where an edit conflict should happen, the edit is silently saved (and thus the preceding edit is silently reverted) instead. This has been a problem for a long time (so we probably have a bug about it already but I could not find it), but anecdotally it seems to have become more frequent recently.
Some examples:
- https://hu.wikipedia.org/w/index.php?title=Wikipédia:Kocsmafal_(nyelvi)&type=revision&diff=16312273&oldid=16312270
- https://hu.wikipedia.org/w/index.php?title=Wikipédia:Adminisztrátorok_üzenőfala&type=revision&diff=16336305&oldid=16336265
- https://hu.wikipedia.org/w/index.php?title=Wikipédia:Kocsmafal_(hírek)&curid=31833&diff=16356451&oldid=16356016