MaxPriorityFeePerGas transaction underpriced

It seems that Infura rejects transactions that have MaxPriorityFeePerGas set to zero. I’m connecting to a Ropsten node via web3.py. Anyone else running into this issue? A priority fee of 1 Wei is sufficient to make the transaction go through.

ValueError: {‘code’: -32000, ‘message’: ‘transaction underpriced’}