R3 router throttling LAN connection

[HighCat]

I've been having issues with the internet and contacted my provider. He got me to directly hook up to the modem and the internet worked fine and as intended (250mbs up and down). However when running LAN through the R3 it gets set all the way down to 30mbs, any ideas what causes this?

I do not have Smartboost on.
When using a speedtest on the Netduma OS menu I am shown the proper speeds, but when testing it through a browser/downloading speeds are throttled. 

[Sentinel82]

You could try turning off hardware acceleration under the Advanced troubleshooting settings and then run the speed test again — it made a big difference to my speeds.  Best of luck 👍