Hi Shikabashi,
i have the same problem when i try to export it as webm or mov-file. In editor it is fine: i compared the first and last frame and both are the same, but when i export it and the animation begins from start there is a small difference as in your bone-animation to see. Nate has written something in spine-discord:
"that could be done in the export settings using Animation repeat and Frames: Range to cut out the looping part. the pain is finding the frame range to use"
I tried it and in export-preview i could see no difference (compared first and last frame), but when the file was exported, there was a visable small "jump". Hope we can find a solution.
