2018 CBR650F.......I was putting gas in ( from a gas can, at home). Tank was already half full. I was pouring it in, and after a second, gas came POURING out of what I'm guessing is an overflow hose at the bottom of the bike? The tank was still only half full. The bike starts and runs like normal. I am totally baffled....and, obviously, not a mechanic. Any ideas?

 

The overflow tube begins at the cap and travels through the tank. I would shine a light in the tank to insure theres not a problem with it.