Anyone got turbo-ed but the speed then somehow when back to the old slower speed ?

Got an SMS during work yesterday that my unifi was turbo-ed, when home and restarted the modem & router and yes speedtest was up from 30Mbps --> 300 Mbps.

But late last night and this morning i checked again, and the speed was down to between 30-40Mbps only. Tried restarting everything again. but still same