Farmland block state is not updated while planting and harvesting wheat

Farmland block does not update and eventually breaks when planting and harvesting wheat with a dispenser connected to two observers.

Steps to Reproduce:
Place a farmland block.
Set up a dispenser facing the farmland.
Connect the dispenser to two observers to automate planting and harvesting wheat.
Use the setup to repeatedly plant and harvest.

Observed Result:
The farmland block does not update properly and eventually breaks over time.

Expected Result:
The farmland block should remain stable and not break while being used with a dispenser and observers.