Automatically opens a new code tab when submiting

Hello, 
I keep 'Enable Side Mode' on so when I open a problem, there will be two windows : left is for coding and right for Description and submission.
But I found that if I submit a new problem, vacode will automatically open a new code tab , while submitting previously submitted question will not. 
I want to ask is there any setting can avoid that?
Thank you very much.