DistroAV - Network Audio/Video in OBS-Studio using NDI® technology 6.1.1

[Stelam]

I created 4 scenes with NDI sources. And created another multi view scene to show the 4 scenes. But I found that the 4 DNI scenes were getting unsynchronized gradually.
Even I show the same NDI source in the multi view scene, the 4 screens are also getting unsynchronized gradually.
Would you please advise how to resolve it? Or any fix for this issue please? Thank you very much.