As WiFi can be so fickle, it's surprising how much it can drop the signal unless it's 'happy'. We have a link that will help you to optimise the WiFi connection though. Just click here.
When running the speed test, make sure the Hub is connected to the Laptop through the ethernet cable. Turn the Hub off and leave off for a minute or so. Once you've done this, turn the Hub back on and wait for it to be fully set up. Make sure all the devices usually connected through WiFi are disconnected before running the speed test through speedtest.net. Pop a screenshot of your results here and we can go from there 🙂