WiFi is a fickle beast that can be affected by numerous things such as building construction, other electronic devices, neighbouring WiFi basically allsorts.
VM supply to the Hub, after the Hub it is up to you.
I and many others on here advocate the purchase of third party equipment to make the household wifi useable.
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BT Smart Hub 2 with 70Mbs Download,18Mbs Upload, 9.17ms Latency & 0.35ms Jitter.