Odroid N2 test builds

Unfortunately not working.
Trying to understand whats going on… it stared to work when I performed the following actions:
still N2 connected to only TV.
connected C2 instead of N2 - CEC not working.
powered off TV so it went to sleep, powered on TV - CEC not working
powered off TV, unplugged power cord from TV, plugged again, powered on TV - CEC start working on C2
connected N2 instead of C2 - CEC still working
selected TV instead of HDMI 2 where N2 is connected) and then selected back N2 - CEC stopped working

Something is really strange happening here…
I’m trying to get some pattern… why it doesn’t work. In the last dmesg log I see there is:
[ 256.377648@1] cectx ff80023c.aocec: warning:ARB_LOST
[ 256.546722@1] cectx ff80023c.aocec: CEC RX len 7: 04 a0 00 80 45 06 05
[ 256.565002@0] cectx ff80023c.aocec: line busy:4

and a lot of “line busy” entries…