Sapphire Thank you for sending your Spine project! I have confirmed the problem can be reproduced on my end. The cause is not yet figured, but as a workaround, changing the FPS setting seems to solve the problem. For example, if you change the Timeline FPS to 30 in the Playback view, this problem will not occur. Conversely, this problem can be avoided as well by changing the FPS in the export settings to 20 or 30 even if you leave the Timeline FPS as is.
I will create an issue ticket for this problem after some testing.
