Based on what you’ve said, it could be a change in player transform when spawning the pawn in each map. Just as a double-check, are you using player starts? Just make sure theyre positioned correctly in each map to confirm that that isnt the problem. Then double-check your spawning code when the map/gamemode loads the player (if this applies).
If youre getting consistent results in testing, like if youve transitioned between maps with your head at different heights and it seems to be the same each time, you could maybe select all your map assets and adjust their Z location lol
Could also manually add some nodes to adjust the player height depending on which map is loaded.
Not sure exactly whats happening without more info, sorry 