Corrupt map tile near Budapest

Hi there!

I found a corrupt tile near Budapest at Zoom level 13:
The bottom-third of the tile is missing.

Sorry I write here, but the bug reporting webform is buggy, doesn’t work, this one:
Always says: Warning: The action “None” is not available.

I cannot say anything about the bug reporting tool, but the rendered map looks perfectly ok for me at the given link. You may well have come across a place that was being re-rendered at the time, that is occurring all the while.