I've been playing my old LAN world after upgrading it to 1.13 (via the optimize world function) and started adding named map markers to all locations in my huge map room (which is a really nice feature btw), but unfortunately some markers disappear after reloading the world. They can only be re-added to the map by destroying the banner, placing it again and readding the marker icon back to the map. Just right-clicking the missing marker banner does nothing. This bug seems to be specific to certain locations in the world and is repdroducible consistently at those locations just by reloading the world. I couldn't find any relationship to banners being near a chunk border, being placed on certain special coordinates or blocks, having a certain orientation or a certain name, this issue seems to be quite random. I wasn't able to reproduce it in any world created in 1.13 or its snapshots/pre-releases.
Other people appear to be having the same problem, as shown here (thx @unknown): https://imgur.com/a/ugewLwj
Unfortunately can't upload the world because it is about 400 MB in size. If anyone has a smaller world where this can be reproduced, please upload or link it here.
Linked issues
is duplicated by 2
Comments 7
Did you use the "optimize world" function to upgrade it to 1.13? No idea if that makes a difference either ...
Hermitcraft's cubfan135 just got bitten by this issue in his latest video https://www.youtube.com/watch?v=yS9Nj4dZH1Q - as I understand it the Hermitcraft world was created in one of the 1.13 prereleases so it's never been a 1.12 world. Probably still a pretty big file though...
This bug was a side-effect of a different bug that I already fixed (MC-133294) so I am going to mark this one as fixed as well.
Thank you - it really seems fixed now! One remaining glitch - if you put a map of the End in an item frame in the Overworld, the green marker will show up on the map even though it's in a different dimension. Should I file another report for that?
The behavior I'm getting is slightly different - re-clicking the existing banners does work to add the markers back, but they disappear again the next time I log out. Unfortunately my world is even bigger - over 1Gb - so I can't upload it either. It's a singleplayer world that's been played in every major release since at least 1.7 (prior to that I wasn't paying attention to version numbers), in case that makes a difference.