The SuitePOS app automatically detects Bluetooth printers (and connects to them) based on the port name. As such it is important you have the correct port name.
If a Bluetooth printer is not detected, a LAN/WIFI printer is assumed and as such it will default the port name to the IP address of the printer configured on the POS Terminal record.
Failing to set the correct port name will result in the printer failing to connect or work.