1.7.2 HDR may be lost occasionally during real-time link

For example, I have linked in real time. Vantage loads HDR normally,
At this time, if I modify the HDR file in 3dsmax-vraydome-map-VRaybitmap and switch to another HDR, vantage will sometimes appear <no name>, and my sky will turn black.
This has not happened in 1.7.1. Since I upgraded to 1.7.2, this problem has occurred frequently

Hi q976431,

Is the scene, where you are replacing the HDR, heavy or does it reproduce with simple scene? Are the hdr maps large in resolution e.g. 16k or small e.g. 2k or it doesn’t matter? I am unable to reproduce it so far so any other info even a video showing the bug will be helpful.

Best regards,
Alexander

The scene is simple without any plants The max file is very small. HDR has several sizes of 16k\\8k. When I returned to 1.7.1, the problem disappeared