Poor frame rate only on germany map

[Ghostmaker]

As per title, why when im taxiing do i get low frame rate compared to all the other maps? Im running a 4090 and a 7800x3d using HP Reverb G2 dcs is also on a dedicated wd Black 4TB m.2 and theres loads of space free

Once im in the air it seems ok. Previously i tried the Phatom and it crashed several times before i even moved from parking. Again all other maps seem fine.