This looks indeed weird, it might be due to rounding the canvas size in order to get the 32x32 frame size. Could you check if this issue occurs when using a 400x400 canvas?
Viewing post in PNG export (spritesheet) not at all like render, very broken
Hi, I had already tried that earlier and it did work when putting canvas size to 400x400 so it outputs a 100x100 sized frame.
I've tried it with different settings, here's the output frame sizes and whether the animation is broken or not:
32x32 - fails
48x48 - fails
60x60 - succeeds
62x62 - fails
64x64 - fails
65x65 - suceeds
75x75 - succeeds
100x100 - succeeds