Since 32.20 update SRAM Force shifting gets sluggish and becomes almost unresponsive after an hour of riding.

Observing after about an hour of riding I begin having difficulty with shifting down to smaller cogs.  I have my SRAM Force right shifter programmed for that function. My left shifter is programmed for upshifting and works flawlessly. The batteries are fully charged and all firmware on SRAM is fully up to date.  This issue has only begun since the 32.20 update.   I can turn the head unit off, wait a minute, and shifting begins working again.