I created a minimal application to demonstrate the problem https://github.com/acuminous/amqplib-764. The issue is intermittent, but increasingly more likely the larger the payload ~affects payloads that are over the configurable maximum frame size~. RabbitMQ splits large payloads across multiple frames, and when using Bun, they are getting corrupted, with bytes from the frames appearing to be duplicated and interleaved. As can be seen the example this results in a number of different problems from misidentifying the frame type, to the frame's payload size not matching the size specified in the frame header.