If there is a holiday at the beginning of the week, and if the holiday efforts are captured early, we are no longer able to submit efforts for the rest of the week.
Please enter the Time off along with the Timesheets in My Timesheet when you have any public holiday on that week. This is the Fixed Solution for your issue. You can clear the entered data by removing it from Time Entry Archive (Master Data==>Advance Settings==>Timesheet Setup==>Time Entry Archive).