krammor I am sorry to hear that you are having problems. I tried to watch your video, but it says I don't have permission to access it and I couldn't check it out. Could you please check your permission settings?

Since I have not seen the video yet, I do not know what the cause is, but please understand that even if it is a bug in the editor, we cannot fix it because 3.8 is already a version that has not been updated.

krammor Thank you for correcting the access rights! I was able to watch the video. The cause is still unclear from the video, but I would like to confirm one thing: Did you change the dopesheet row height in the Dopesheet - Dopesheet item height in the Spine settings? The default value is 23.

If I remember correctly, the newer editor versions have already fixed this, but I believe there used to be a problem with key selection when a floating decimal was specified for the row height on the dopesheet. Could you please check what value is specified for this setting?

krammor Thank you for confirming the Spine settings! Nothing in the settings you have shown us appears to be the cause of this problem, so unfortunately we cannot answer further on this issue unless we know how to reproduce it. If updating the editor version resolves the issue, please consider updating your project version.