Remote re-starts after approximately three hours

  • Since a couple of weeks I've got an issue with my Remote. After starting up (in Performance mode), the Remote restarts after about three hours.
    I've noticed furthermore that the brightness of the led-screen isn't that bright anymore. I've got two identical set ups: one Kemper 19" + Remote (my home and rehearsel rig) and one Kemper 19" + Remote (my live rig).
    For now I have a workaround: after two live sets, I turn off and on my Kemper, between sets. But that's not a final solution. Any suggestions before opening a ticket?