[solved]Wan Interface does not auto reconnect after RJ45 pull/plug

Hi,

I'm running a classic mwan3 config on my wrt1200ac with ISP Box on wan and USB tether on wan4g.

I'm doing some tests (playing around).

When I pull the ISP box cable from my router mwan3 put the wan offline: so far so good.
But when I plug back the cable I need to reconnect manually the interface.

Is there a way to auto reconnect wan interface on hot plug ? Or I've a pb ?

I've found a solution here

https://github.com/openwrt/packages/issues/3885

last_resort = default

using this options in policies does the trick (!?)