I have an AC1750 acting as a router for my (Virgin Media Hub) Modem, I have recently bought and installed a new RE450 Wifi Booster to increase wifi in the top floor of my house.
Over the last few days since installing the RE450, I have had to restart the wifi constantly, as the speed will drop to around 3-4Mbps (on a 350 package), on both (2.4 and 5) original AC1750 channels and RE450 (EXT) channels.
I also have a powerline connected to my PS4 and have found the same problem of low (3-4Mbps) speed, until i restart the router.
Both router and booster are up to date/firmware etc.
Any suggestions or guidance for checks?