exports sometimes don't include adjustments?

I have a feeling this has come up before, more than once.

Sometimes the exported JPG doesn't include one or more of the adjustments.  In the case that just happened for me, it was a 'highlights' slider.  Exporting again didn't fix it.  Closed C1, restarted, exported a third time and it worked.  

Annoying when you're exporting a group and have to check every one for correctness.