to reproduce the problem, you need to disable select at least one bone, then select at least two bones and press cmd+A
version spine 4.2.32
Bone select disappears
Demonichka Thank you for reporting the problem with detailed instructions. I think this was a very difficult procedure to discover. It is a great help.
I have created an issue ticket to fix this issue here: EsotericSoftware/spine-editor807
We will fix it as soon as possible.