i can confirm the crashes, i was working on a 2988px x 5312px 72PPI canvas and all the sliders were sluggish, the app felt choppy and when i tried to transform something, the app crashed, 3 layers btw, 2 of them almost empty. I don't think that canvas size is that large to crash the app, worked in the past on a similar canvas size (bit smaller but 300PPI) and around 40 layers and never had a problem >.<
I saw you updated the app today and added something about memory/ram, so ill try again.