How to stop Wi-Fi signal dropping
This occurs due to your devices specific Wifi settings.
If you have the option to automatically connect to available networks, your phone or tablet will try and connect to the strongest internet based wifi signal that it can find automatically. The Olfi is not an internet based wifi and will pull the connection away. Also, mobile data can have an impact on this with certain phone types.
To alleviate the chances of your downloads failing or remote connection being lost, try temporarily putting your phone into flight mode (to stop mobile data issues), but enabling Wifi, and then go to your Wifi settings and find the setting which would enable your device to automatically connect to available wifi connections without prompting you, and disable it.