I have noticed that some services reloaded with a procd "interface.*" raw trigger are reloading on a much more frequent cadence (few minutes or so). LEDE 17.01 does not do this. LEDE Trunk does. I can not find an obvious cause in procd. Though procd should not stop-start for reload without a command line change or explicit file under watch. Perhaps netifd commit a03216660797173fbe67866f75564e3fec9c1e8d is generating unusual numbers of IFUP.
I can confirm this using tools that use an interface trigger with optional interfaces. If WAN (ip4 only) and not WAN6 is used restarts almost never occur. If WAN6 is included, then restarts are occurring every few minutes.
for iface in $ifacelist
procd_add_interface_trigger "interface.*" "$iface" /etc/init.d/[script] [command]