First of all thank you for the great work, using CoreElec for some years now!
With 19.3 CEC with my LG 55C7 was working perfectly. I never switch off the CoreElec device, and when I switch on the TV CEC works instantly. However with 19.4 now sometimes I have to switch HDMI channel back and forth for CEC start working again.
update: Today my box also froze with 19.4, had to hardreset the X88 King S922 box by removing power. I did not have this problem running 19.3 for months. Also some mkv are now stuttering when playing. Going back to 19.3 solved the stuttering.
Any ideas what it can be and what do you need for information so see what can be the underlying problem?