Only a couple of things I can see that MAY be causing
the issue, but guesses only.

Detail Faces is set to off, instead of auto.

Narrow Hull Offsets is set to standard 32. If your walls are thinner
than 32 this it may cause problems.

Otherwise, is there any way to send me the level?

"There is no fate but what WE make." - CEO Cyberdyne Systems Corp.
A8.30.5 Commercial