Android - Cash Drawer Issue

Cash drawer is not opening on Android devices with the Android POS. The cash drawer does work, and open when using other apps but not with Linga. 

Using this device for Pizza Twist location and using the existing hardware for this location. So, it's not possible to replace the new device. The other POS is working fine but they have issue with Linga POS. Planning to install the POS in multiple locations.
Need to fix the cash drawer issue.