Changing /etc/init.d/boot like below enabled my 5GHz so fix works again.
killall -q hotplug2
[ -x /sbin/hotplug2 ] && /sbin/hotplug2 --override --persistent \
--set-worker /lib/hotplug2/worker_fork.so \
--set-rules-file /etc/hotplug2.rules \
--max-children 1 >/dev/null 2>&1 &
load_modules /etc/modules.d/*
/sbin/wifi detect > /tmp/wireless.tmp
[ -s /tmp/wireless.tmp ] && {
cat /tmp/wireless.tmp >> /etc/config/wireless
}
rm -f /tmp/wireless.tmp
apply_uci_config
config_load system
config_foreach system_config system
# killall -q hotplug2
# [ -x /sbin/hotplug2 ] && /sbin/hotplug2 --override --persistent \
# --set-worker /lib/hotplug2/worker_fork.so \
# --set-rules-file /etc/hotplug2.rules \
# --max-children 1 >/dev/null 2>&1 &