Same problem :-(
Temporary solution until they fix it: if you edit each task it appears again in the today box.
... but you have to keep editing all your tasks every day or two to cause them to show up. I have a lot of scheduled tasks.
So, I'm experiencing this problem now as well!
@np1902 @tpv0rtex @mpulce
Really sorry for the problem. It's been fixed by now. Please check.
If any further questions, please feel free to contact us.