Uart to send light level to phone not working

I'm trying to send data from the mirco bit to an app, I am using mircobit v1, and I can send moisture levels, and temperatures to the phone, but when I try to send light level it gives a 020 error. I tried displaying the light level on the mircobit in the same program and it did not work. When I tried displaying the light level on the mirco bit in a different program it worked.

Mircobit code
microbit-bluetooth-code.hex (1.3 MB)

App inventor code