loginwindow repeatedly crashing on 2014 iMac on Sonoma

I'm not sure the best place to share debug info (it seems bugs are no longer accepted on Github), but I have a full crash report available from macOS.

Upgraded my 2014 iMac 27" 5K (15,1) to Sonoma, applied root patches, all was well. After the display goes to sleep and the screen locks, I'm unable to login. The screen turns on, but before you can type in the password, it goes dark, then pops up again. This happens repeatedly, forever, every few seconds. In order to use the iMac, I must use "caffeinate" to prevent the lock screen from showing up.

If I reboot, I get a crash report. The abbreviated info is:

Crashed Thread: 8 Dispatch queue: com.apple.scenekit.renderingQueue.LUIAVTView0x7fdd91156770 Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x00007000115507c2 Exception Codes: 0x0000000000000001, 0x00007000115507c2 Termination Reason: Namespace SIGNAL, Code 11 Segmentation fault: 11 Terminating Process: exc handler [173] VM Region Info: 0x7000115507c2 is not in any region. 

I figured this may be related to the moving wallpapers, so I set it to the Ventura wallpaper but had the same result. I did the over-the-air point updates to Sonoma with the same result. This is with OCLP v1.2.0.