Any idea why the "Wi-Fi Assist" iOS feature continues to kick in, despite being in the same room as my modem/router unit that constantly puts out 250mbps speeds? I've got unlimited data, so it's no big deal...just can't figure out why Wi-Fi Assist keeps kicking in when I've got such a strong wifi signal in my small apartment. This has been happening since the feature was introduced in iOS 9. I've also had a few different routers since then and it's happened with all of them. Thoughts?