I am going to use this opportunity to ask: Why is that stackoverflow sites absolutely, positively cannot seem to remember my cookie preferences and seemingly ask me every single time I find myself there?
And yes, it's a known issue going back several years. The official response is "it affects less than 1% of our users, so fuck you".
I use multiple browsers for testing, across multiple computers.
Perhaps this fact, along with their consent expiration policy causes the consent dialogs to always show.