I got stucks with memory overflow ery often last week. And seems its somehow Project dependet. Cause some project with same images count and 20M mesh - works fine. But some projects stuck with out of memory no matter 20M mesh or 1M.
Last stuck was just minute ago. Needed to reboot to back to life.
PS. I work on Laptop MSI dominator PRO GT72 2QE (32GB ram, NVidia GTX 980M 8GB, and big SSD for system and CR )