Super Shuttle Interferes with MiFi

I just had the weirdest experience: my devices connected fine to my Verizon 4G LTE MiFi hotspot immediately before and then also immediately after my ride in a Super Shuttle but during the time I was in the Super Shuttle none of the devices (and I tried 3) would connect to the hotspot. The WiFi network of the hotspot was still there and detected by the devices and upon choosing to connect, I would be prompted for the WiFi password but after entering it, I would get a connection timeout. So strange. What in a Super Shuttle could cause that?!? I should have done a WiFi analysis--that was a missed opportunity! I have previously experienced where in a WiFi-heavy area the hotspot simply did not broadcast an SSID. I later searched for information on this issue and found others have experienced it as well (see https://community.verizonwireless.com/thread/666385) and they, like me, consider it a bug that needs to be fixed but in the meantime, the workaround is to set the device to use a specific channel, which I did. Maybe that channel was overwhelmed or something. Is that possible? Is there a circumstance around that issue where I'd be able to see the WiFi network but not connect to it?

Anyway, if you too hit this issue, know that you're not alone. And if you have any thoughts as to how to deal with it, let me know. Fortunately, I have no plans to ride in Super Shuttle again any time soon. But avoiding Super Shuttle in and of itself is all well and good--but there's nothing that says that this issue couldn't crop up somewhere else too, which is why I'd sure love to get to the bottom of it.