Since upgrading to OpenWrt 19.07.2 r10947 my 2.4 Ghz radio in my MR18 keeps going down and then becoming available again after a while.
Issue has persisted through a system restart
Kernel logs around the time the radio is shutting down:
[181740.257001] device wlan0 left promiscuous mode
[181740.261835] br-lan: port 3(wlan0) entered disabled state
[181741.506440] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[181741.601164] br-lan: port 3(wlan0) entered blocking state
[181741.606686] br-lan: port 3(wlan0) entered disabled state
[181741.612513] device wlan0 entered promiscuous mode
[181750.149736] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[181750.156453] br-lan: port 3(wlan0) entered blocking state
[181750.161998] br-lan: port 3(wlan0) entered forwarding state
[181760.277999] device wlan0 left promiscuous mode
[181760.282846] br-lan: port 3(wlan0) entered disabled state
[181760.849533] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[181760.907222] br-lan: port 3(wlan0) entered blocking state
[181760.912820] br-lan: port 3(wlan0) entered disabled state
[181760.918672] device wlan0 entered promiscuous mode
[181760.923671] br-lan: port 3(wlan0) entered blocking state
[181760.929192] br-lan: port 3(wlan0) entered forwarding state
[181761.328116] br-lan: port 3(wlan0) entered disabled state
[181769.453920] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[181769.460673] br-lan: port 3(wlan0) entered blocking state
[181769.466158] br-lan: port 3(wlan0) entered forwarding state