HDMI CEC bug raspberry pi3

  • Hi,

    i used to have a 3 years-old Panasonic-TV and replaced it with an LG910V Oled a few weeks ago.
    Currently i am running v7.90.010 ALPHA and its working flawless with only one problem that is occuring again and again.

    When i click through my library, the system is freezing for some seconds randomly and then it scrolls like 2 or more rows down (or up, if i pressed the up button).

    My receiver is an Yamaha-RX477 and CEC itself is working fine (at least i can use the control from my AV to go through the menu and the usual stuff).
    I thought it is related to my "old" Panasonic-TV but it is still the same with the LG.
    Is there any known bug for this? Maybe a Yamaha issue?

    I installed librelec several times completely from blank.
    Can a slow micro sd-card be an issue?
    Maybe mine is bad (some samsung evo) .. but i will buy an SanDisk Extreme PLUS 16/32 GB soon.

    Hope you can help me :)
    I can provide a log, but maybe it's just a known bug.

    Kind regards!