HDMI audio is not working (Laptop is connected to LG TV via hdmi)

[displaylinkuser]

Hi,
I've a docking station.
I've connected my lg tv to the docking station via hdmi cable.
Docking station is connected to asus laptop.

I can display my PC screen via the TV,
I can not see the LG TV as a playback device and I can use the TV speaker,
even if I look deep in audio playback devices of windows 10 - Not there.
If I connect the HDMI cable directly to the laptop - I can see the LG TV as a playback device and get audio from the TV.
It's strange, because in the past it worked,
It stopped working since I replaced the HDMI cable to longer one - since then it's not working.

Attached log file