Version: Odoo 16

Preface: I am not a developer and am entirely using the no-code UI of Odoo. 

I am currently experiencing an issue with the today activities filter when a user clicks on "today" under the activities notifications in the top right. The "Today Activities" filter does not show the activities that are due today until approximately 11am. 

So far I have checked odoo bot timezone, user timezone and server time and they are all set correctly. Does anyone have any ideas?