There is a bug on Minecraft we're maps will not load in on Minecraft bedrock edition. I am not completely sure if this bug is on Java but hopefully not.
Basically the summary explained it but basically when you put a map on an item frame or just look at a new map there is nothing. This is not a big issue but can definitely annoy people and or confuse people.
Environment
Bedrock Edition
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Resolution: Unresolved β Invalid

Also sorry that the version says 1.14 etc. I did not see a beta option so I just did the newest version but donβt be fooled, this map glitch is on the newest snapshot on Minecraft bedrock edition.
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Yeah many users are reporting this. It's not just on servers.Β
Unfortunately this report has been raised under the wrong project.
This project is for the Bedrock Dedicated Server software only. For bug reports related to Minecraft Bedrock please head over to the Minecraft (Bedrock codebase) project.
However we are already tracking this issue over in the MCPE project so please up-vote the existing report rather than creating a new one. Some common reports are linked below however if yours isn't there please use the search feature to find it.
MCPE-69652MCPE-74339MCPE-76166MCPE-76168MCPE-76180MCPE-76224MCPE-76341MCPE-76384Ionic
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