Well, If you place a Barrier in front of a blue tinted glass wall, it appears as if the Barrier is behind the glass, creating a visual layering glitch. I know the water(Transparent Barrier) was intentional, but... This is weird.
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Duplicate of MC-9553 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.