I've found this bug where when you take a map from your creative inventory, dupe it using pick block and give it to someone else, moving around, and then clearing the creative inventory using shift+click-thingy, you will stay on the map of the other play, but you won't move. (Obviously Multiplayer)

How to reproduce:
1. Go in creative
2. Get a map and load it
3. Dupe it using pick block key and give it to someone else
4. Move around
5. Clear creative inventory with shift+click
Result: You will stay on the map of the other player, wherever you cleared your inventory. When you move, the arrow on the map of the other play stands still.