Dune HD Homatics Box R 4K + LG SOUNDBAR LG S95QR + DOLBY VISION problem

Hi, i try a lot of stream boxes (shield pro, firesticks, etc) and all works fine connected to my soudbar ( LG S95QR) and playing dolby vision vids, the only one that is not working great its the Dune HD Homatics Box R 4K, the image flicks some times and the tv shows invalid format for a moment.

Its is something different with this box compared with others that cause this dolby vision problem?. Connected to my tv directly works perfect and its older than my soundbar.

Thanks in advance