P: Content Aware Fill on gigapixel shots crashes

>>> PS 2018 only <<< 2019 CC works

I have a small strip at the top of my gigapixel pano that I want to Content Aware Fill. I choose the operation and PS immediately crashes.

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x000000105e5c2e20
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [0]