X-Pro2 Intermittent problem; can't isolate it or reproduce it with consistency.  I'm seeing it on moves like a pan or tilt.  It will either drop or raise exposure by what looks like a half stop.  New firmware has been on the camera for a few weeks.  Just started noticing the problem today. Not sure what's going on...or if it's lens-specific. Wanted to see if anyone else has a similar issue?