U2725QE USB hub recognized as 2.0 when connected to MacBook Pro

Hello, I have a the Dell UltraSharp 27 4K Thunderbolt Hub Monitor U2725QE that's connected via Thunderbolt cable (the one that was delivered with the monitor) to MacBook Pro M1 Pro running MacOS 15.4. 

Display works great without any problems at 4K 120Hz however USB hub and devices connected to monitor are sometimes recognized as USB 2.0 protocol, even though monitor is properly connected as USB4/Thunderbolt device. Even the Ethernet network adapter that's built into monitor is using 480mbps USB link which makes it's 2.5Gbps transmit rate useless. I sometimes, because sometimes (after reconnecting thunderbolt cable) it properly recognized as USB 3.1 (just reconnecting cable, nothing more). I tried all 3 thunderbolt ports in MacBook - all behave in the same way.

Please see attached screenshots from system info below.

How can I make the USB hub work as proper USB 3.1 device speed? It seems like a firmware bug in monitor for me, but Dell support asked me to contact Apple in order to verify everything is fine with my MacBook (link to post at Dell support community)

Proper USB 3.1 sync:

USB 2.0 sync:



[Edited by Moderator]