Help_disappearing bone layers when playhead moved

Support Animation and Rigging
1

I just recently ran into a problem on a rig. If I select say the face rig Panel bone layer it appears on frame 500. If I move the playhead one frame the bones disappear and the selected panel unselects. Haven’t been able to figure it out. Not sure what is happening. Any help appreciated. ?

Here is a stripped down link.
https://drive.google.com/file/d/14TEWVWZTBhHlthaaP4jRT9E0xycci-Hi/view?usp=sharing

2

ok After four bud lights, I found I had inadvertantly set a keyframe on visibility in visible layers in the blender file. DUH! I have to switch to some more tolerant beers!