When the 3 bears went on their walk while their porridge cooled, they left the front door open.
When Goldilocks approaches the 3 bears house the front door is now closed.
When the Wolf first opens the door after Goldilocks leaves Grandma's house the big black hinges on the door have disappeared. They reappear the next time the Wolf opens the door again.
The three bears plop into their chairs at the table with their backs to us, with Papa Bear on the left, Mama Bear in the middle and Baby Bear on the right. We then see them from the front across the table and Papa Bear is still on the left when he should be on the right.
The papa bear drinks hot water from the kitchen faucet. The hot water knob is shown on the right and the cold knob on the left. This is opposite of what they should be. Hot should be on the left, cold on the right.