Bluetooth pairing problem

I have a bluetooth dungle which will not pair with Lubuntu. It produces the pairing numbers but never successfully pairs even when I reduce the pairing number of digits to 1.

I tried another Linux distro and it works. DOes anyone have any suggestions?

I had the same issue with my OontZ bluetooth speaker. Accessing it using ‘bluetoothctl’ didn’t help either. The weird thing is the first time it worked, but on reboot it failed. The ‘Wizard’ work first time only.