The bug
Tinted glass can be used to look through water

Reproduce

Method 1:
1. Locate a water body and go on an nearby island.
2. Type the command : /summon minecraft:armor_stand ~ ~ ~ {ArmorItems:{},{},{},{id:tinted_glass,Count:1}],Invisible:1b}
3. Give Yourself night vision and see through the tinted glass.
Notice that water is not visible.

Method 2:
1. Locate a water body and go on a nearby island
2. Hold a tinted glass in your hand.
3. Go into Third Person view.
4. Give Yourself night vision and see through tinted glass
Notice that water is not visible

Expected Result
Water should be visible like in normal glass