Thank you for contacting Plugable support! Sorry to hear about this issue. I’d be more than happy to assist you.
We have a troubleshooting tool that helps us find out what is going on in situations like this. Please plug the dock into your computer, then go to this page and follow the instructions there:
If possible, I’d like to get a set of the diagnostics from when the USB ports are in a non-functional state. Please mention ticket # 326470 when emailing the results.
Please don’t hesitate to let us know of other questions.
Thanks again for contacting Plugable support and best wishes!