IRQ pin nRF24L01+ Unresponsive (Unable to Transmit)

Question

Hello, 
 I bought few nRF24L01+ modules and I integrated them in some custom PCBs that I designed. 
 I haven't been able to transmit information: 
 
 The TX FIFO is full (in FIFO_STATUS register TX_FULL = 1) 
 The IRQ signal is never cleared 
 
 In order to send information: 
 
 I send the payload (5 bytes) using the command W_TX_PAYLOAD 
 I set PRIM_RX = 0 and PWR_UP = 1 in the CONFIG register (I turn on the transceiver and I set PTX) 
 I wait ~2 ms 
 I set CE = 1 
 I wait 100 us 
 I clear CE = 0 
 
 Nothing happens 
 
 IRQ signal = 1 
 The information is still in the FIFO TX 
 
 
 After setting PWR_UP = 1: 
 
 I see how the Crystal starts oscillating 
 I see a 1.8 V signal in VDD_PA pin 
 
 
 Configuration of the module: 
 Pin Configuration 
 
 MOSI = SCK = CSN = 1 
 CE = 0 
 
 Registers Configuration 
 
 
 Wait 100 ms to let the module turn on 
 
 
 CONFIG register = 0x00
(IRQ enabled, CRC Disabled, Power down, TX mode) 
 
 
 EN_AA register = 0x00
(Disable auto acknowledgement) 
 
 
 EN_RXADDR register = 0x01
(Enable data pipe 0) 
 
 
 SETUP_AW register = 0x03
(RX/TX Address = 5 bytes) 
 
 
 SETUP_RETR register = 0x00
(Re - Transmit Disabled) 
 
 
 RF_CH register = 76
(RF Channel selection) 
 
 
 RF_SETUP register = 0x00
(Disable continuous carrier TX, 1 Mbps data rate, Power = -18 dBm) 
 
 
 STATUS register = 0b01110000
(Reset STATUS register) 
 
 
 RX_ADDR_P0 register = 0xB6B5B4B305
(RX0 Address = 0xB6B5B4B305) 
 
 
 TX_ADDR register = 0xB6B5B4B305
(TX Address = 0xB6B5B4B305) 
 
 
 RX_PW_P0 register = 5
(Payload size = 5) 
 
 
 Flush TX FIFO (Command FLUSH_TX) 
 
 
 Flush RX FIFO (Command FLUSH_RX) 
 
 
 Power Up the module 
 
 
 
 
 
 I'm able to interact with the module via Software SPI; Is my assumption since the module is responsive to the commands I send and the values that I read are correct 
 
 
 The 3V3 power supply line is quite clean. 
 
 
 In addition to the suggested capacitors, I added a 100 uF capacitor between 3V3 and Ground to filter the signal and to give the extra current that the nRF24L01+ may need 
 
 
 I also tried powering up my design using an external DC Power Supply 
 
 
 I always send different payloads (until the TX FIFO is full) 
 
 
 I'm not using CRC, Acknowledges, etc. I thought it would be nice to keep it simple at the start. 
 
 
 I don't think the module is getting reset at any point, since the values in the configuration registers are unchanged. (I have checked this at different points) 
 
 
 Is there perhaps a specific order in which the module needs to be initialized? Timings? 
 
 
 
 I greatly appreciate your help, if you have concerns about Code Implementation, Schematics, Oscilloscope lectures, etc. Please let me know and I will gladly share the details.