When crafting a map zoom, the map only actually zooms occasionally. Sometimes it will clear the map completely and requires reloading the world to start using the map again.
More info - If I manually move the zoomed map to my inventory, and then my hotbar, the new map creates properly. If I shift click it directly to the hotbar, it doesn't form a new map and often wipes the data of the map I just changed from. When I drop it into my inventory, it changes to one map, and then settles on the new map it should be when I drop it on my hotbar.
Example:
I craft a map. The game gives it map slot #4.
I zoom the map and shift click to create. It stays the same map and sometimes wipes map data.
I zoom map #4 and drop it directly into my hotbar with a manual move. It sometimes becomes the map I want and it sometimes becomes a random map I've created previously.
I zoom the map, move it into my inventory and then move it into my hotbar. It creates the correctly zoomed map I am trying to create.
Related issues
duplicates
Comments


Not very helpful dheatfan. I added some more information and how exactly I get the bug to manifest. Test it if you want.

Related to, if not duplicate of MC-87

Very much related. I did a search before I posted this, but the title of MC-87 is VERY specific, whereas I tried to cover all the problems I've found with map zoom and not just shift click.

Marking as a duplicate of MC-87 – will leave a note there pointing back here.
Really? It's working fine for me...