Our first attempt at using the work-around was successful. I was able to move windows, on the secondary rotated monitor, w/out latency or artifacts. This was tested using our Tera2 Zero Clients (running the latest firmware) connecting to Horizon 8.4 Agents w/ PCoIP. We are going to do more testing, to include verifying the IDD driver doesn't cause issues with Horizon Client + Blast. Will try to pull down logs to see/verify the events appear back to "normal."