The twilight forest magic map is not rendering correctly while using the first person mod's hands. It should show a map in your hands, just like a vanilla map, but is showing the map item.

Minecraft 1.18.2
forge - 40.1.48
firstperson-forge-2.1.0-mc1.18
twilightforest-1.18.2-4.1.1102-universal

This has to be done by the Twilight Forest mod(adding a 3rd person rendering in general).

It's part of autoVanillaHands now, so it will switch to the vanilla view while holding the map.