I recently received a replacement router through warranty.

The box says AX3000, but the info through the router's setup page (192.168.0.1) says it is an Archer X55.

I believe I have seen other posts of this problem.  Intermittently, and often, I the router loses internet connectivity. The light on the front goes OFF, then goes Orange, and then a few moments later (say 7 seconds) comes back green.  In that time, I will experience issues with devices over WiFi.

I use WiFi calling. I will have dropped calls or won't be able to hear the person for a few seconds. Playing games on the Nintendo Switch will cause connection faults and brutal lag.  I also use Tidal (music streaming app) on my phone to go through my Bluesound Node2i network streamer on my home theatre system and when I lose connection the music stops for like 10 seconds.

My older Archer C7 router DOES NOT have this problem. I used it while my new router was sent away.

I have replaced the modem. I have reset the modem.  I have done previous, basic requests from TP-Link support like changes the Primary/Secondary DNS to google's. Thus far - no change.

I believe the issue is an odd one with binding MAC addresses between router and modem or a firmware issue with the router.
 

If this can't be resolved, how do I go about getting a refund.