Plugable products that have an ASIX AX88179A based Ethernet adapter may not perform as expected when using browser based speed tests, such as SpeedTest.net.
If you are running a browser based speed test such as SpeedTest.net using a Plugable ASIX AX88179A based Ethernet product such as our USBC-7IN1E Hub on macOS 11.6 Big Sur. Example pictured below.
At this time the best solution would be to upgrade to macOS 12 if possible, as this problem is fully resolved in macOS 12 Monterey. Example pictured below.
You can manually start the update process to macOS 12 Monterey by following this link. --> https://apps.apple.com/us/app/macos-monterey/id1576738294
The ASIX AX88179A is a driverless solution with macOS, and there are no drivers or firmware solutions for this problem at this time.