yugutou Thank you so much for the detailed explanation! I was able to reproduce the problem. It seems that this problem does not occur in versions up to 4.1, and only occurs in 4.2. Also, as you said, when the bone's translate key is set to -100, the bone's coordinates become misaligned, but this does not occur when the value is set to -50, 100, etc. I will create an issue ticket to fix it.
