SPEED PROBLEM JUST STARTED

[GeminiGem]

My MR60 MESH Router system just dropped speed to a crawl.  I can reboot and it is blazing fast for about 5 minutes and then drops to a crawl.  Has anybody else encountered this.  It just started this a few days ago and nothing I have tried seems to work.  Speed goes from 900 MB to 90 MB five minutes after a reboot.  HELP PLEASE.  

[plemans]

1. what modem/gateway is it connected to? 

2. is this wired or wireless speed?

3. when it happens, check your wan port statistics page. It shows the connection from wan to lan and the lan ports. (post them back here with a screen snip) 

https://kb.netgear.com/24222/How-do-I-display-Internet-port-statistics-on-my-Nighthawk-router

4.