This issue is present for me in both previews 451 and 461 of v0.91. Rendering of components appears to be completely broken, as are their thumbnails. An example:
The logs provide no help, as this is a graphical issue and there are no related error/warning/info messages. I’m running this under Arch Linux 5.19.9-zen1-1-zen with the NVIDIA drivers on X11. I have an Intel i9-9900k and an RTX 2070.
I have no idea what the issue is, but this was not present in 0.90. I can always provide more information if needed!