My internet just had an upgrade from 300/30 to 350/35 Mbps. If I connect directly to the modem router I get 350, but from the deco m9 plus i get still max 300 (cabled) I already rebooted it, but it st

I used to work fine with my old Ziggo modem, together with 3 Deco M9 devices set up as an access point. Now I had to change my old Ziggo Modem to a new Ziggo ConnectBox, so I thought it would be simpl