so recently i finished building my raspberry pi 3 with integrated official 7" display. I finished doing all the updates
apt-get update && apt-get upgrade && apt-get dist-upgrade && apt-get install kali-linux-full
i have every thing looking good. connected my alfa card to the Pi and ran both ifconfig and iwconfig and the card is being recognized. then i noticed that it would disappear so i would run the commands again and the card would be back up.

wlan1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 00:c0:ca:84:bd:a6  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlan1     IEEE 802.11bgn  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
i press on the wifi icon on the top right of the screen and i see
Wi-Fi Network (Atheros UB91C)
i thought it was a bit odd that it wont pick up any AP's around me, not even my own.

i tried doing #airmon-ng and it shows

root@kali:~# airmon-ng

PHY	Interface	Driver		Chipset

phy0	wlan0		??????		Broadcom 43430
phy9	wlan1		ath9k_htc	Atheros Communications, Inc. AR9271 802.11n
but when i try to start the monitor mode on wlan1 the terminal just freezes.

anyone that could point me in the right direction to get this card up and running. i know the card works fine because i can use it on my VM of Kali and the bootable USB. just not sure what is going on with the Pi.

FYI. im only using 1 power supply going into the Pi if that makes a difference.