How to remove problems which are added in my todo list?

I have added a problem in my todo list but it’s not getting removed from there even after solving. Could anyone let me know why this is happening?

It might take a minute or so to get removed, but it should get removed automatically when the problem is fully solved.
If not, can you please send an email to bugs@codechef.com with all the details? Problem code, screenshot, etc.