RDP volatile environment variables not populated

I've looked around and haven't seen anyone else talking about this, so I thought I'd ask the group.

I'm seeing an issue where users who connect to our View 5.3 environment via RDP do not have their volatile environment variables populated, but PCoIP users do.

I'm not sure why there would be a disparity, but I was recently attempting to script an action and this came up, so I don't know how long it's been an issue.

Has anyone else seen this? Is it expected?

Thanks,

Thomas