And that's exactly how I would discuss the situation with a player who believed that the original Hide gave them invisibility, and then they described trying to walk past 6 guards at a gate in broad daylight. I'd say, okay they guards see you and tell you to stop, drawing their weapons. If the player said, but I was hiding, I'd confirm that they aren't just trying to waltz by them as if invisible, and then resolve the uncertainty. Because you're not actually invisible, you just have the invisible condition, which assumes a different scene and a different approach by the PCs.