Entities cannot pathfind out of the lowest level of flowing water that is one block deep

The Bug:

Entities cannot pathfind out of the lowest level of flowing water that is one block deep.

Steps to Reproduce:

1. Build the setup as shown in the provided attachment.

1. Using a spawn egg, summon a villager in the water while looking at the diamond block.

2. Wait for the villager to notice the nearby workstation.

3. Observe the villager's behavior for a while.

4. Take note as to whether or not entities cannot pathfind out of the lowest level of flowing water that is one block deep.

Observed Behavior:

Entities cannot pathfind out of the lowest level of flowing water that is one block deep.

Expected Behavior:

Entities would be able to pathfind out of the lowest level of flowing water that is one block deep.