I found on occasion while I was animating, that some of the bone in my rig turned off unexpectedly. I must keep reactivating the check mark to select the bones in the viewport. is there some hotkey that I wasn't aware of causes me to accidentally turn off the "select" check mark in the bone property?
Bone Select sometime just turns off for no reason
chuckle70 Perhaps you have experienced the following case:
EsotericSoftware/spine-editor807
The behavior documented in this issue ticket was by design, not a bug.
That seems like what is happening.