I updated an old map, and instead of just updating the terrain as its supposed to do so, it now has weird gray lines all over spread over the map. If i hold it or mount it on an item frame the same gray lines appear.
1. Update an old map
2. It isnt updating properly and has weird gray lines on it
Thank you for your report!
We're actually already tracking this issue in MC-179858, so I resolved and linked this ticket as a duplicate.
However, that ticket has already been resolved as Fixed. The fix will arrive in the next version or is already included in the latest development version of the game.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.
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