Roomba 100 Will Not Connect but shows connection

I've had my Roomba 100 since Christmas. It's worked well for 8 months (minus like one instance when it lost connection mid clean, wasn't a big deal.) All of the sudden, the other day, it suddenly behaves as if it's not connected. When I hit the "clean" button on my app, nothing happens. The app told me my Roomba needs help, it looked like it needed to be reconnected. So I go through the process of reconnecting, I get to the point where I enter my Wifi password, I press the power button, and it tells me it can't connect. It reminds me that I need a 2.4 Ghz connection, my Wifi is through Xfinity, and that is not something I ever had control over. I have tried rebooting 100 times, it does nothing. I've removed the battery, not that would do much, and unplugged my router, although I was sure that wouldn't do anything, and it didn't.

Here is the weird part. I check the Xfinity app, and it shows my Roomba as being connected, with strong connectivity. And last night while trying to figure this out, trying to reconnect for the 1000th time, it didn't get to the point of having me press the power button and it told me it won't connect. But oddly, the home page said ready to clean, not Roomba needs help. So I hit the clean button, and it cleans the house as normal. Then when it's done, it fails to update the log as to last time it cleaned, etc.

If anyone has any idea what my options are here, I appreciate it in advance. I have rebooted 100x, endlessly try to reconnect, etc. Wifi shows as it's connected, so I'm clueless as to what's going on.