Lens mount friction / tightness normal??

Hi friends! I bought a used xt5 camera some days ago. When I am putting a lens on I got a bit surprised because there is some resistance or friction and I definitely have to apply some mild force to mount it.

I have an older XT20 and there mounting lenses goes super smoothly.

Hence, I was wondering if this lens mount tightnesss is normal? Anybody some experience with this?