Word Bump - Banter (screen)

[KKMcK]

I was just playing word bump today. I got up to level 8, but after I put in the word: banter and it accepted it, I wasn't able to create anymore words. Even if correctly spelled, no matter how many times I pressed the "Submit Word" button they just wouldn't go anymore. I wasn't sure if pressing enter would work, so I tried, but nothing. Usually even if they were wrong, it'd submit, but the words would just disappear.

Screen: