Ok I see, yeah it seems to be due to recurring tasks in my tasks always showing up in the default first section when you complete them.
You can amend this in the settings:
Otherwise set up a rule in your “my tasks”. Now for the trigger you would have to see what you want to set up, could maybe be for all tasks added to the certain section or tasks with a specific custom field entry (you can potentially add one for task type and for all that have “recurring task” as task type the rule applies