I have an old Rpi2, the one without wifi antenna.
I have a TPLink usb wifi dongle (model TL-WN725N).
When I start Librelec, dongle led is not working and in the menu I cannot acces the wifi options (in my PC dongle works fine). That's why I think the dongle is not recognized by the rpi2 with the last version of librelec (11.0.3).
It's like going to the mechanic with the car, use the keys and the car won't start...