clear session on trigger before page load cause sort behavior misbehave

1) I want to have my sort value to default every time user visit the page, so I apply clear session behavior. I tried all plausible option triggers, and since I want to avoid using reset button, I found trigger before page load works best. The problem is, when I apply this option, sort behavior misbehave, ie. before this when I click my header the column will sort asc and click again to sort desc, but only when session behavior trigger before page load is applied the sorting mechanism fail to single click sort to asc. 2nd click nothing happens.

2) Is it possible to set trigger to the page link and how?

1) by clearing the session on page load, each time you load the page it is performing the sort for the first time, you will need to use a reset of some sort to trigger clearing the session you sort ask how to do the reset in your 2nd question

2) set the link to have a UR variable:

page?clear=true

go to the bindings panel, click the plus button and select URL variable. name the URL variable "clear". in the clear session value behavior, click the lightning bolt next to the trigger and select the clear url variable binding. This way the session will only clear when the link is used