Which kind of tasks don't appear? Do you mean the ones that are created in each card (the Task section), or when you are marking the whole list as a task list in a hamburger menu? The latter one does have issues and I've identified its source.
Quick tests show that the 'My day' view is affected by new time-tracker records :/ I see it now. Fixed.
Edit: marking the whole list as a task list now works again. Adding and tracking tasks in cards should work as is.