So confused

Hi all, im having a strange problem at the moment… i imported my character yesterday and it was all working fine, it has 4 uvmaps, today i decided id work on it a bit more so i exported from ue4 but when i re-import it seems to remove the uv channels, i have tried to re-export with different settings but no luck. anyone have any ideas as to what might be happening? it seems to happen with all of my custom models now even ones made with fuse but i can export and re import other assets totally fine

I decided to try convert it to a static mesh and export then re-import and it keeps the UV’s… so why is it messing up as a skeletal mesh??

The first picture is how it looks if i export and then re import, the second pic is what its supposed to look like