Copper golems sometimes don't leave the item on chests when there are slabs on top of them

When you put a slab at the top of the block that is above the chest (like that block of air so they can open the chest), sometimes the copper golems don’t react to it, others do. Furthermore they react when the chest is closed after being open by the player or other copper golems running towards the chest and then stop after it.

• Steps to reproduce the issue: Put a copper chest and a normal chest in a small place and then a copper golem then put some slabs like shown in the video and just fill the copper chest with any item so the copper golem can grab them

• Expected result: Copper golem can put all the items in the normal chest without any problem

• Actual result: Sometimes doesn’t put the items in the chests and by pushing it, works but I’m not 100% sure about it