I am experiencing horizontal band flickering when using webcams through my TBT3-UDZ thunderbolt dock. If I plug cameras directly into laptop (or use with former dock) there is no flickering. Cameras are Logitech 920s and Nexigo N930AF. I use a HP Elitebook G6 850 on Windows 10 w/ 16GB RAM and Intel i5-8365U 1.6Ghz. I am using two UHD monitors at 4k through DisplayPort cables.
Flickering appears different (grey w/ Nexigo, multicolored w/ Logitech) but persistent flickering with both when plugged through dock, nothing when plugged directly to laptop. Flickering appears to worsen as I move video feed around screen.
I have updated the BIOS, video, and USB drivers for my computer, and I have applied the Dell patch referenced in other support strings indicating similar issue to no effect.