Not getting my full internet speed through WD livewire

I have my cable modem in the garage hooked up to WD Livewire, my computer in the rec room shows a minimum of 100mbps connection to the livewire, usually 120mbps+

I have 50mbps internet but am only getting 30-35mbps on speedtest. but if i plug my laptop right into the modem in the garage i get 45-48mbps which is what im used to getting. Is there a reason why the WD Livewire cant seem to give me my full speed available from the modem?

Have you tried connecting to a different outlet ?

The connection could be degraded due to a bad outlet

make sure both the main Livewire and the one that connects are on the same electrical circuit