MBP15 2017 i7 3.1 with 560 Radeon Pro 4GB GPU
Modelled something really simple - a sphere (that simple!). Assigned four materials to some vertices.
Literally fired up Rendered Mode to have a first "test" look at the model in the viewport using RPR.
Wasn't what I intended so I pressed Shift-Z to stop the Rendered mode to fix the material assignments on the model but... instant crash.
Logs and file attached but I suspect it doesn't crash for anyone else. I bet if I load it up again it won't crash for me.
This is what happens all the time for me.
I do hope the random crashing issue can be located. This particular model of MBP seems to be extremely unstable with RPR.
I hope the logs help somehow?