Thank you for contacting Plugable support! Sorry to hear about this issue. I’d be more than happy to assist you.
For the display issues, we’ve been seeing increased display problems with or without docks in use after the update to Big Sur 11.1. There’s actually a huge thread on the Apple forums with 19 pages of replies about various troubles: https://discussions.apple.com/thread/252174979
We’ve been told these issues are being looked into, for the moment we don’t have a solution. We’re hopeful the next macOS update may help this kind of behavior.
I’d be curious to hear what brand and model monitors you’ve got so I can see if we’ve seen those models have troubles for other customers.
For the network failures, there is a known issue with the Apple provided built in macOS Ethernet drivers for the Realtek RTL8153 USB 3.0 Ethernet chipset used in our dock (and many other docks and USB Ethernet adapters on the market). When put to sleep, the problematic driver creates an Ethernet broadcast storm which can overwhelm some Ethernet routers.
For macOS Big Sur 11.x users, at this time there is no updated driver available due to Apple’s change in driver models from “KEXT” to “DEXT”. Realtek is currently developing new drivers to support this new macOS version. For now, we recommend to disable your Mac from sleeping to prevent this issue, or use WiFi instead of Ethernet until the new driver is available.
(For macOS Catalina 10.15.x users we can provide you with an updated driver and installation instructions.)
Please don’t hesitate to let us know of other questions.
Thanks again for contacting Plugable support and best wishes!
Senior Engineer | Product Owner