Slide remote suddenly reverts to I/R intermittently

Title says all. Suddenly, both our slide remotes are intermittently falling back to I/R (LED is red when it should be yellow). The Bolt is about 10-15 feet line of sight from the couch where both remotes reside. Battery reported as 40% on one of them so I changed both sets of batteries. They now report 80% but both still occasionally revert to I/R.

Nothing at all has changed in our system, physical layout or firmware revision. The Bolt is about 4 feet under the LCD TV and about 18...

Slide remote suddenly reverts to I/R intermittently

Slide remote suddenly reverts to I/R intermittently