remote low battery warning

Yesterday my X1 box reported that my remote batteries are low. The Remote Settings screen says 26%.

I charged another set of batteries and replaced them, but it still shows the same level. I replaced them with an unused set of batteries, still 26%.

There was a similar thread from a year ago where one of the suggestions was to reset the X1 box. I tried that, but no help.

The remote is an XR15 with firmware version 2.2.34. Could it be a problem with the remote itself?