AC1900 WiFi Mesh Extender - DHCP Issue

Product : EX6470

Firmware : v1.0.3.30

Same problem as reported but I found a possible cause.

Sometimes DHCP request sent thru the extender doesn't succeed.

In this cases I saw that there's always at least a duplicated IP in the connected devices list of the extender interface.

It seems that old ip addresses are kept in memory (how many time ?) and cause an issue if there's a new dhcp request for the same device while its old ip is already taken by another device.

I explain :

1. 1st state :e. :
   device A ip  = x.x.x.22
   device B x.x.x.32
2. 2nd state :
   device A no more connected and ip expired
   device B renews its ip and get x.x.x.22

I the extender memory we see both device A an B with the same ip (x.x.x.22), it's a bug in the ex6470 ...
At least, as soon as a new ip is catched, other devices with the same ip should be remove from the connected list.

While device A is still present in the list, dhcp requests don't work properly thru the extender.

I only found 2 way to solve this manually :

- Restart the extender to empty its connected devices list (very impacting solution, not smart at all)

- Force my dhcp server to give a new specific ip to the mac address of the impacted device (it works immediately)

If netgear could solve with problem in a new micro code update, it would be nice.