I’ve bought a Baseus QTUR0JR6C1RP hub, as advised by the Purism wiki. I’ve tested it with my computer and with a Samsung Android phone - worked flawlessly, including charging and video. Used the Librem charger.
Then I connected it to the Librem 5. The phone turned itself off and I was not able to power it on again.
The phone responded to connecting a charging cable by lighting a red light, but no other signs of life.
I did 1). Around 16 seconds when keeping the power button pressed, a green led lights up and there’s a vibration. 1-2 seconds later the led goes dark again. But when I tried powering on again, it worked OK!