When we submit a solution to a problem and it doesn’t get accepted, we have to make the extra effort to go back to the problem and then click the submit button again.
It would be good if codechef adds the feature of resubmtting the solution without going to the question page.
Ideally, it is true. If your solution doesn’t get accepted then you should read the problem statement, constraints again 
Anyways, you can put your suggestion here. A thread dedicated for discussion for new features.
Or instead you can just press BACKSPACE key on your keypad twice and you will have your submit window back.
Hope it helps, Best Luck 