Gloabl fog renders incorrectly in SteamVR

When using Global Fog in the latest version(5.4.0f2) in SteamVR. when you blend your neck to the left or right side, you will notice that the "height fog" only appeared in one eye. I've already submit a bug report, case number (815234) a week ago, but not getting any response.

screenshots bellow:
screenshot 1 - normal:
View attachment 193651

screenshot 2 - blend neck to right side
View attachment 193652

screenshot 3 - blend neck to left side
View attachment 193653 ...

Gloabl fog renders incorrectly in SteamVR