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Unreliable connection on USB-C to Ethernet adapter

I recently purchased a new Win10 64-bit laptop with no Ethernet port. I obtained a USB-C adapter with three USB-A ports and an Ethernet (RJ-45) port. I leave it connected most of the time. When I turn off the laptop and restart it, my network connection works well for a few minutes, then drops off (no internet). After I unplug and replug the Ethernet cable one or more times, my internet connection returns and stays on.

Another PC connected directly to the wired Ethernet hub (without the adapter) has no problems. Also, I can connect to the router via wifi with no problems.

(Configuration is coax cable -> cable modem -> Ethernet cable -> router -> Ethernet cable -> Ethernet hub -> Ethernet cable -> USB-C adapter -> laptop)

Does anyone know whether there is a fix for this?

Running Win10 64-bit Home v21H2 19044.1466 on an LG Gram 17Z90.

Using Uni adapter https://smile.amazon.com/gp/product/B0871ZL9TG

Thanks!