The Bug

It's very simple. Breed two frogs, let them lay their eggs, wait for the hatch and BAM. Some of your tadpoles are dead(unless your frogs are smart and laid their eggs out in open water).

Reproduce

• Get Frogspawn
• Place a wall around the frogspawn
• Wait

Observed Result

Some Tadpoles spawned inside the wall

Expected Result

Tadpoles wouldn't spawn inside blocks