I'm really interested in this topic, since we have he same problem in our company.
The only difference is that we can not reproduce it reliable.
We are using an universal docking station from Targus (
https://www.targus.com/uk/universal-...power-acp77euz), which are utilizing a DisplayLink ethernet chip, for our Dell and HP laptops.
Once the error occurs, it can be reliable linked to the docking station.
Unplugging ethernet from the docking station and connecting it directly to the laptop eliminates the problem with available shares. Reconnecting to the docking station results in shares not found.
This can be repeated over and over again with the same results.
Unfortunately, since this problem is rather infrequent (and regarding to company compliances), i can not provide (publicly) network traces to help further investigating into this problem.
Kind regards,
Stephan