Okay, new chain is a change that happened from working correctly- to not working correctly.
So, is the chain an incorrect fitment?
Rather than the chain being too long and the oil delivery hole in the bar being too far forward to align with the slot in the bar pad- is it too short and the hole in the bar is being held further back and still not aligning with the slot in the bar pad?
Can you compare the new chain to an old chain length wise?
Is the bar 0.050 gauge and well worn between the rails and the new chain 0.043 gauge?