MultiWAN has slow failover

Hey,

I have the latest Tomato Firmware using the MAX option.

I have the device configured for failover to the 2nd WAN if the main internet connection for WAN 1 goes down.

The issue I have is that WAN 1 seems to hold a DHCP lease from the network and it takes about 3 minutes to fully failover despite having a 1 minute option checked. If I manually release the DHCP IP Address the failover is instant. Is this a bug or is there a way to make failover most instantaneous?

Thanks.