Going to post it again, since last post disapeared. I have an Archer AX11000 behind a provider modem/router. DMZ in provider modem to Archer, LAN to WAN. Provider is only used for iptv and sending...

My Archer AX11000 router is behind an Experia router/modem, Lan to Wan. Since a while I had 200/200 internet speeds with actual 200/260 even. No issues. Always working. Yesterday I upgraded my...