1 | initial version |
Your monitor mode packet is perfectly readable - it's a Block Ack packet, which is a type of control packet for 802.11. In monitor mode, you'll see lots of packet types, many of which are management and control packets, rather than data packets. You can try capturing with a capture filter of "type data", which should discard all the management and control packets.
Not all 802.11 adapters support a useful promiscuous mode; perhaps yours doesn't.