Since I installed the beta of Kodi 18 (LibreELEC v8.90.004 ALPHA), I noticed that the Kodi checker isn't working well anymore.
My leds start working when a video starts, but as soon as I stop the video, the leds aren't working anymore when I start a video again. When I restart the hyperion serivce, everything is fine again.
I disabled the Kodi checker for now, and removed power from the leds via OpenHAB (which I had already running)