my nighthawk XR500 ?(V2.3.2.40) keeps kicking me out of PS4 online games constantly

it all start like a week ago and i thought it was the router so i contacted amazon, and they sent me a new which ended it up being worst since as soon as i connected everything it was getting dos scan attacked every second by a random ip which is wierd, ended returning that one but my original one keeps disconnecting me from the COD servers, and Lagging for a few mins on the battlefield service , and battlefront 2 as well, i don't see any negative logs in the XR500, however i can see one perticular log on my modem which also happens to be a netgear CM1000. the log is Warning (5) message timeout and mac adresses for the modem, i get kick off the game as soon as the log shows on my modem, i have spoken to the netgear helpdesk and they really didnt know what was going on....... my ISP is sending a tech tomorrow just to check the signal which everything looks great on their end they say. one thing to notice is that my ps4 connected to my cell phone would work fine with no isssues, connected to the modem it self, it would just lag for 5 secs when that log shows up, and it would disconnect while connected to the XR500, i tried a different router and when the log shows it would be hit or miss, sometimes it would kick me off and sometimes it would just lag for 5 secs... it all says network connection timed out when i get kick off the game but i would still be signed in to the PSN network. sorry for the long story but i don't what else to do since this router is very expensive so i need your help is anyone knows anythig about the issue