Photos crashes on MacBook Air/Catalina
Latest upgrade of photos and Catalina has crashed multiple time while scrolling thru 30K images in All Photos display. More recently it locked up (did not respond to mouse or keyboard) after exporting 4200 photos from a folder directly connected LaCie drive. The folder created using photo sweeper to mark duplicates. And yes, all software fully up to date and ample free space on all disks.
MacBook Air 13", macOS 10.15