I have an H3 orange pi pc. CEC works at first, but if I change input sources and return, or turn off the TV (samsung), then CEC doesn't come back until I reboot. Everything else looks good, though. I used nightly 20210320 and the stable release 9.95.1.
I have 9.2.6 on a Rpi3 that doesn't have this problem.
on my opi pc i have a problem with the CEC, after playing youtube content, the CEC does not allow turning off the TV, neither during nor after stopping. It looks like it is inverted, it doesn’t let me turn off the TV, and it doesn’t turn off the TV when it goes into standby or turns off. After turn on, before reproducing youtube content, the CEC does not have this problem. I realized that it also happens after returning the screensaver even without running anything.