Is QoS reducing Speedtest.net download results?

I’ve just replaced a local microwave broadband ISP with a T-Mobile LTE WiFi gateway. It works great. I have one mystery though: when I connect to the gateway’s own WiFi I get speedtest results like 135 Mb down and 35 up. When I connect through the Balance One the download speed drops to 22 or less. Actual performance shows that we’re getting far better download rates than that, so I suspect my QoS is deprioritizing speedtest.net. Google speed test reports 36.5 Mbps down/31.2 up.

Here’s how my QoS is set up:
All Supported Streaming Applications ↑ High
All Supported VoIP Protocols ↑ High
All Email Protocols ─ Normal
All Supported Remote Access Applications ↑ High
All Supported File Sharing / Transfer Applications ↓ Low

I removed all the QoS settings and got the same results, so I think I’m barking up the wrong tree. Still, if anyone has any suggestions, I’m all ears.

This is largely a cosmetic issue but it’d be nice to be able to get reliable speedtest results.

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