Suddenly cannot access my Desktop after logging into Fedora Cinnamon 41/42

All was well last night but this evening I find myself unable to access my Desktop after logging in using kernel 6.15.8 although I can access the Desktop after logging in using kernel 6.15.7.

Fedora Cinnamon 41/42 kernels were updated and working well before yesterday and I have not accessed the workstation between when it was shut down last night and early this evening.

Keep using the 6.15.7 kernel.
If in 6.15.9 it still has the fault, report a bug in bugzilla.