Following issue occurs with a USB 3 hub (UGreen, Model 20291):
I realized that my mouse and keyboard are not working sporadically, both after a reset and after power off/on.
It seems that this happens if a bootable medium (USB stick, SSD) with an MBR partitioning scheme is connected to the same USB hub.
(all devices are for sure connected to the Atomic Pi via a USB hub - I have no breakout board with additional USB slots)

Devices with UEFI partitioning scheme do not seem to interfere.

The exact same setup does work with a USB 2 hub - but live media are really slow then...

Anyone has a similar setup working and could tell me the brand and model of the hub?