Bug#1025213: Extra info
I also tried mutter 43.2-4 without the Debian patches, specially the Support-Dynamic-triple-double-buffering.patch . This did not solve the problem, The only difference is that during blinking of the cursor there is switching between 2 different (old) backgrounds i.s.o. 3.
Bug#1025213: Extra info
I installed all mesa-packages of previous installed version 22.2.0-1. I also installed previous installed kernel 5.19.11-1. With these versions the problem still existed.