fatal error: unhandled exception (During Bump Maps)

[eepjr24]

I am applying quite a few bump maps in my current project (regional map) and get the fatal error about 1 in 6-8 times. The image is kind of large (~86 MB) but most times works fine.

System is Windows 10 Enterprise 64 bit
Gimp 2.10.22. 
25% memory usage with 64 GB Physical ram installed. 
Processor Intel® Core™ i7-8850H CPU @ 2.60GHz, 2592 Mhz, 6 Core(s), 12 Logical Processor(s)