wat is the expected behavior of OBDII Bluetooth adapter

i was sent a v2.1 mac 66: 35: 56: 78: 90: AB
i setup torque to read ~11 PID and display 9 (total ~13 different sensors)
i see that from time to time it fail to read some of the sensors
get disconnected and a number of times coldent connect at all until i unplugged the adapter and replugged it
just to put me fears at rest id like if aders can write how are ther adapter working
and if this is the normal behavior of the faulty v2.1 mac 66: 35: 56: 78: 90: AB