To reproduce the issue:

• go to https://fr.wikipedia.org/wiki/Monastir%C3%A1ki#/maplink/1
• click 4 times on the zoom-in button ("+"), and position the map so that the green marker is in the middle of the screen
• you see on the left of the marker a label that reads like OHZEIO (sorry, I don't have a greek keyboard), and on the right side, just "KI"
• if you click another time on the zoom-in button, you'll see that the label on the right was supposed to be MONAZTHRAKI

In the "zoom+4" map the label was truncated from MONAZTHRAKI to KI.

That looks similar to an issue I just had with Mapsforge (see issue) and osmdroid (see issue).