We recently built an aquarium on survival, and tropical fish seem to not be able to swim over blocks. All blocks in the aquarium are water source blocks. The fish, when trying to swim over our glass walkway get stuck in the block and cannot swim over the glass. They just run into it and keep swimming, not moving. There is no coral or seagrass to get stuck on. To recreate this, make a large aquarium setting w all water source blocks, and add a glass 3 block high tunnel through it, and the fish wont be able to swim all the way over the glass blocks. Plz help