mempool min fee not met when using sendrawtransaction

I'm currently using 0.12.0.

When I attempt to broadcast a 0 fee, non-dust output transaction using sendrawtransaction, I get the following error message:

error code: -26
error message:
66: mempool min fee not met

After restarting the node, the transaction broadcasts just fine. Shouldn't local RPC calls be excluded from the memory pool's fee policy?

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