Unrelated to Lunar but here is my fun monitor bug: Sometimes when I connect my Intel macbook to my external ASUS ROG monitor via display port, a strip of pixels about 1cm wide are "moved" from the far right of my external monitor to the far left. My monitor is on the left and my laptop is on the right, so if I move my mouse from left to right, my cursor starts on the left (just right of the error strip), moves off the right edge of the monitor and then back onto the strip at the left edge of the monitor, and then further right onto my macbook display.

This has happened 5 times in as many months, and is fixed by unplugging and replugging the usb-c end of the display port cable a few times.