In order to continue to use Choetech PD 100W charger with Librem 5 (and current Hub combo) you might try to upgrade/extend it with this converter through another E-Marker USB-C to USB-C cable or even by 12V and/or 20V PDC003 5A cables. It is that I just guess that there is something unusual on how this particular Choetech charger controller (not known to me): “Identify automatically the voltage and current of the devices, including 100W, 87W, 45W, 30W, 18W, 15W” (negotiate it on its USB-C ports) between “available PD, QC and Apple 2.4” protocols. Perhaps you like to try out linked, relatively small investment, but cannot guarantee it will improve anything (20V negotiation should work with your laptop too).
And sorry for my 19W number above (should be written = max. of 7W) as I don’t have my Librem 5 yet, therefore thought original charger is 30W, but it isn’t:
