Transmitter's IRQ pin is not low

[edriyin1]

I tried to transmit data from BME280 and ADXL345 with STM32F103C8T6 breakoutboard. However sometimes I can't read low from IRQ pin and can't transmit any data. To solve this, I connected the pin which we should connect IRQ pin (In my case PA0) to GND and now It works.

Line 51 in Enrf24.cpp says that IRQ pin should provide low. But It didn't.