Skipping cards in pleco Flashcards

Hey, I scoured the internet for an answer to this question but could not find it.

What happens to cards I use the "skip card" function on when inside a flashcard session. Does it get excluded from the category and all other tests indefinitely? Or does it get skipped for just that session and will be randomly selected to join my flashcard session at a later time?

Thanks a lot for helping out