Who I have the same questioned this topic

My 5G Home Internet Gateway (ASK-NCQ1338) is working fine except for the IP/MAC Binding feature.

I just want the Gateway to assign the same IP address to my laptop every time I connect to the wifi.

This is a common and standard wifi router feature which the user manual says is supported. 

When I attempt to add a new rule to the binding list, the rule gets added but is labeled in RED as "Rule Invalid." 

I contacted Customer Support and got to a level 2 rep who said I was configuring it correctly.  We made multiple attempts with rebooting, different configurations, etc etc.  No joy. Basically he gave up as he had exhausted his knowledge.

Can I please get some support from your firmware people?  I'm running version 214322 which is listed as the latest.