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 Catalina 10.15.x users, please contact us via email@example.com and we can provide you with an updated driver and installation instructions.
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. Feel free to contact us via firstname.lastname@example.org and we'll be happy to notify you once updated drivers are available.