onRestoreInstanceState is not being called

[Synthoova]

Strange issue....

For my use of RangeBar, onRestoreInstanceState isn't getting called, and so when my activity wakes after the device has gone to sleep, the RangeBar pins and values are not visible. Moving the thumbs of the RangeBar doesn't bring them back.

Any thoughts?

I do have an ID set, and I'm sure it's not colliding with another view.