Bluetooth does not work on 4.4 SFOS

it is impossible to send a file via bluetooth to whatever device i have on hand (1 SFOS 1 android)
it is either impossible to receive from the same devices

Which SFOS device you are using? So with what device you see the problem?

it does not work with the XA2 Ultra

when trying to connect to the Fairphone2 running SFOS 3.
the error message is
“Problem with pairing authentification. The passcodes did not match”
with earlier version of SFOS on XA2 it worked OK

and the android tablet is not even seen by the XA2