So at yesterday's rehearsal, I saw that the led diode's (and LCD screen) of my remote were a lot less bright than the ones on the two other remotes (bassplayer and other guitarist).
I mean, the difference is actually huge. In bright sunlight they would probably be barely visible.
I have exactly the same problem. It started occurring the same time as I started experiencing issues with my remotes’s connectivity. I sometimes have to plug the remote cable in 3 times before it reads the profiler head. The brightness of the remote display was affected since then. I have not found the solution yet but will log a support call soon. I keep putting it off as I dread having to send the Kemper in for repairs from South Africa as I have no replacement while its gone!