need to press twice RETURN to validate with bash-it

Question

I discovered today bash-it which has quite nice bash themes for the terminal. But I'm confronted to a weird issue, and I didn't managed to find on the Internet someone else who have it. When I enter a command and validate with the RETURN key, I have to press it a second time to get the hand back on the command prompt.

For instance, in the following picture, I put a red dot each time I press the RETURN key. The first time, I get the result of ls then I have an empty line. I press a second time and the prompt is displayed again so I can write a new command.

The theme used here is candy, but I have the same issue with the other themes I tested.

Is there a way to disable this "twice RETURN behavior" ?

EDIT : after a disconnection/reconnection to the server (I'm using bash-it on a remote server), I don't have this issue... It doesn't really make any sense, but it is working...