Let's say I have a Two Handed weapon on one bar and two One Handed weapons on the second bar, as well as three armor pieces, all in the Twice-Born Star set. While on the second bar, I have 5 TBS pieces equipped, so I get to use two Mundus Stones at once. So I select two Mundus Stones, and then switch to the first bar, on which I have only four TBS pieces. What happens with the 5-piece bonus? Will one Mundus Stone disappear, and if so, which one? Will they both stay regardless?