Big lightning storm yesterday. No internet today. Went through chat line diagnostics with WOW. Modem is bad. Get new Surfboard SB6190 from store. Hook it up all good. With hard wire from modem to PC i get the advertised speed of 200Mbps. Going thru the TPLink Deco 5 mesh it drops to 90-100. Updated the mesh system, still the slow speed. What gives? No other users on the wifi when this is happening.