DirecTV Volume changing on its own

Hi all.  I have a strange issue with my DirecTV service that just started recently.  I think it occurred around the time of the software update to my receiver.

Behavior:

When navigating the Guide, Menu, or changing channels the volume will also change.  The volume seems to change based on the last action taken.  So for example if I lowered the volume initially, then navigate the guide using the Channel buttons the volume will continue to go down until it reaches zero.  The opposite happens if I had raised the volume initially.

Equipment:

• Genie 2
• 4K Genie Mini, Model C61K-700
• Samsung UN46D6000 TV
• Denon AVR-E300 Receiver (using HDMI ARC)

None of my equipment has changed in years.

Troubleshooting (didn't resolve issue):

1. I've rebooted & reset everything
2. I've removed and re-paired the remote
3. I've tried a different remote

"Fix":

I found that if I turn off HDMI Control on the DirecTV receiver (Settings -> Display) the issue is fixed.  The problem is that I want to use HDMI Control for switching between inputs (Roku box, etc.) on the TV.

Has anyone ever seen this behavior before?  If so do you have any ideas on a long term fix?