Mis-alignment of message payloads

[ordinary-information]

I am using rust-rdkafka, specifically a StreamConsumer; however, I don't believe this is relevant to the issue. The payloads of the messages from consumers are transiently misaligned (implying alignment is not guaranteed off the wire and sometimes I get lucky, but generally the buffers are not byte aligned).
Is there a setting I can use to ensure padding in the underlying buffers is used to ensure that byte alignment for payloads happens? I can copy the data to properly aligned buffers, but it would be great to keep zero copies... Thanks for any help!