Multi wan switch default gateway issue

[xbipin]

i have noticed one issue regarding multi wan and allow default gateway switching ticked under advanced settings. Suppose i have 2 wan connections, both pppoe and gateway monitor enabled but with ip as dynamic and suppose the default connection doesnt connect, in this case the gateway monitor ip is left blank so it populates with dynamic so it actually never triggers the gateway as down and switches the gateway to the other wan because in system log i keep getting errors such as cant set route as dynamic in which case the ping is also not sent and in turn doesnt trigger a default gateway switching procedure, now if the gateway monitor ip was set to something then it would work

php: rc.filter_configure_sync: The command '/sbin/route change -inet default dynamic' returned exit code '68', the output was 'route: bad address: dynamic'