Bitstreaming TrueHD stutters and keep showing "Dolby ATMOS" logo on LG CX tv

I tried with different installations and TV modes and I never managed to get smooth playback without audio stuttering and "Dolby ATMOS" logo popping up every minute or 2

You can see it here



It happens with LAV audio decoder and with ffdshow, and regardless of whether the tv's refresh rate is set to 120hz or 23.9hz.



My setup is Intel 10600k + RTX 3070 + LG CX connected with HDMI 2.1, I have no problem getting HDR 4k 120fps with VRR for games, so I don't think it's an HDMI bandwidth issue.

Media info of the audio track:

Audio #1
ID                          : 2
Format                      : MLP FBA 16-ch
Format/Info                 : Meridian Lossless Packing FBA with 16-channel presentation
Commercial name             : Dolby TrueHD with Dolby Atmos
Codec ID                    : A_TRUEHD
Duration                    : 1 h 32 min
Bit rate mode               : Variable
Bit rate                    : 6 905 kb/s
Maximum bit rate            : 8 211 kb/s
Channel(s)                  : 8 channels
Channel layout              : L R C LFE Ls Rs Lb Rb
Sampling rate               : 48.0 kHz
Frame rate                  : 1 200.000 FPS (40 SPF)
Compression mode            : Lossless
Stream size                 : 4.45 GiB (38%)
Language                    : English
Default                     : Yes
Forced                      : No
Number of dynamic objects   : 13
Bed channel count           : 1 channel
Bed channel configuration   :

https://www.reddit.com/r/nvidia/comments/jyrh39/any_30803090_lg_c9_users_doing_4k120hz_dolby_atmos/

It is a hardware compatibility issue, or maybe issue with NVIDIA driver.