I have the same problem. After upgrading, my atheros ar9271 drver has changed to wlx00117f1b8dec and it's not showing my old wlan0 network interface. This new interface barely works in monitor mode but the problem is, i cannot connect to my wifi. It shows available wifi though, it does not connect to any of them. Spent the whole figuring out the issue but nowhere is any solution.

my railink adapter now showing wlx000762cfe instead of wlan1 after upgrading to kali 2019.4 though i renamed it back to wlan1 using this command "ip link set wlx000762cfe name wlan1" and wifi started working again.

usama, yes, it work, but after reboot name "wlan0" reset to default "wlxa...".

Edit the file
73-special-net-names.rules
with your favorite editor
in /etc/udev/rules.d:

copy/paste in this information. remember, each rule needs to be on it's own line and reboot...

wlan0

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?",
ATTR{address}=="00:01:02:03:04:05",
ATTR{dev_id}=="0x0", ATTR{type}=="1",
KERNEL=="wlan", NAME="wlan0"

This should be fixed with kali-defaults 2020.1.0.

To disable the MAC-based naming, kali-defaults is now setting up this symlink:
ln -sf /dev/null /etc/systemd/network/73-usb-net-by-mac.link

This regression is related to a change in systemd 244-2 that replaced the former udev rule with this systemd configuration file.