The newest commit removed the "workaround" to use wifi & wps button LEDs for wifi 2G/5G status indication.
https://git.lede-project.org/?p=source.git;a=commitdiff;h=3228c2a682f287337db3dda880bc1e35ebaa7ce9
We have to manually add the workaound back. Either directly to /etc/config/system, or to the LED detection script in /etc/board.d. Note that the "rfkill" LED has also been renamed "wifi", so the previous workaround does not quite work.
I added this to my own build:
r7800)
ucidef_set_led_usbport "usb1" "USB 1" "${board}:white:usb1" "usb1-port1" "usb2-port1"
ucidef_set_led_usbport "usb2" "USB 2" "${board}:white:usb2" "usb3-port1" "usb4-port1"
ucidef_set_led_netdev "wan" "WAN" "${board}:white:wan" "eth0"
ucidef_set_led_ide "esata" "eSATA" "${board}:white:esata"
+ ucidef_set_led_wlan "wlan2g" "WLAN 2G" "${board}:white:wifi" "phy1tpt"
+ ucidef_set_led_wlan "wlan5g" "WLAN 5G" "${board}:white:wps" "phy0tpt"