By default, when a person is engaging with a Convo in a bot, if they type something, the Convo will let them know they are in the middle of a Convo and ask them if they are sure they want to do something else. That message looks like this:
This is useful if your main goal with the bot is to have customers go through a guided Convo and you don't want them to be distracted by other things.
However, for bots with a lot of train bot responses set up or a lot of Convo recommendations, you might find that it's in your favor to turn this feature off. Once it's off, if a customer types in the middle of the Convo the bot will respond and/or recommend Convos as it's trained to do normally.
You can control this in your Bot Settings: