Thank you for contacting Plugable support! Sorry to hear about this issue. I’d be more than happy to assist you.
There is no firmware available for the docking station at this time that would affect Ethernet performance. Please note that we are not aware of any Ethernet issues with macOS 11.4, but we had seen issues prior to 11.3.x that we’ve documented here for reference: https://kb.plugable.com/question/776031
With that said, your issue sounds different that what we’ve seen in the past since you mentioned other USB devices are disconnecting as well.
If you’ve not tried so already, I’d recommend the following:
- Unplug power from the dock and unplug the dock from the Mac
- Perform an SMC reset: https://support.apple.com/en-us/HT201295
- Perform an NVRAM/PRAM reset: https://support.apple.com/en-us/HT204063
- After logging back in wait about 30 seconds then plug power back into the dock and plug the dock back in to the Mac and see if the behavior has improved
If the behavior is still happening please let me know.
Thanks again for contacting Plugable support and best wishes!
Senior Engineer | Product Owner