Curves and edges are see through in rendered view (last update bug?)

Hi everyone,
after a recent update my rhino 8 SR10 has weird behavior when it comes to rendering curves. They seem to be there, but are like little windows into the backgroud when rendered over the surfaces. attached screens show shaded and rendered view with settings on the side.
clearDrawOrder does nothing. BringToFront just puts curves over everything and acts like an xray. Kinda lost what couldve caused this and what i can do about it.