Trying latest build and the issue is persistent.
Wireframe have some strange behaviour that makes lines shrink and than disappera on zooming.
Switching in shaded mode makes the viewport “crash” (as reported in previous posts).
I’m at present using the MacMini with only one monitor connected via USB-C.
Spent few minutes testing this build on my MacBook Pro (14", 2021) M1Pro too and the issue seems to appear after few minutes of work in ghosted mode.
It seems not to happen in wireframe, shaded, rendered and xray mode
Just a note: wireframe is not so consistent, sometimes the lines became very thin and than again showed as they should.