Console will give me a + if I give too much code once

[yii-iiy]

My codes here: ast.levers.r

If I paste them in webr editor once then click run, nothing wrong happened; but if I just paste them twice or more in webr editor, it will give me an + like this:

and some error which should not happens would be happened when I give it more define.

They (to run same code once or twice pasted) have different behavior, but they should have same.

Same issue shall occurs when paste too much code once to the console.