I have an issue with a model downloaded from sketchfab.com - some of its animations have a noticeable delay (sometimes 2-3 seconds) before they start (see video below). It only happens when running them using JME. On sketchfab its working fine.
Also, a note… sometimes the sketchfab viewer is doing some magic, I guess. I’ve downloaded things like Victorian houses that on sketchfab have shingled roofs and stuff… but none of the downloaded models have any of those textures. It’s very strange.
…so it wouldn’t surprise me if there’s some magic cleaning up bad animations or someone just hand-fixed it or something. I have no idea why the displayed model is sometimes different than the downloaded one.