The Bug:

Frogs don't lay their spawn on waterlogged blocks.

Steps to Reproduce:

• Build the setup as shown in the attachment below. setup.png
• Summon multiple frogs around the setup and breed them.
• Observe the behavior of the frogs closely.
• Take note as to whether or not frogs lay their spawn on waterlogged blocks.

Observed Behavior:

Despite frogspawn being able to exist above waterlogged blocks, frogs will never place their spawn here. They only consider water blocks themselves to be valid placing locations.

Expected Behavior:

Frogs would be able to lay their spawn on waterlogged blocks.

Code Analysis:

Code analysis by ampolive can be found in this comment.