I see it as: you decide that this feeling-bad sucks, and that you have to do something about it. You decide to undergo the investigation. You undertake the investigation. You look at it from all angles, etc. etc.
Then, once you clearly see the facts – that is the ending of the belief or the issue. After this, there’s no choice anymore - you can’t ‘choose’ to have that issue be a problem again. You’ve already seen it isn’t. It would be like trying to choose to feel angry that you don’t have a unicorn, or something silly like that. You wouldn’t be able to do it.
This is my experience anyway – I agree, once I see the fact, that is the end of the issue.