Sometimes this happens, and there is nothing I can press to back out of it and make corrections. I have to double-press and swipe app away. May not be our fault. Have also reported to Tapatalk. May just be iPhone stuff even.
I've seen the same error a couple of times. It happens when there's an emoji in the title. My phone never got stuck, but it was impossible to post on such a thread until the title was edited.
Yes, the emojis tend to cause the spam warning, but in the example above, using TT on an iPhone, the OK or Cancel option is covered by the keyboard, and therefore inaccessible.