This is occasionally a problem that the specific engineer enables. It's normal for an engineer to work directly with product, and if they develop a rapport they

This is occasionally a problem that the specific engineer enables. It's normal for an engineer to work directly with product, and if they develop a rapport they'll start side-stepping management with additional requests. Over-eager engineers will then sometimes train PMs that they're a good place to make those requests, even if they're big enough that they should be prioritized in the normal flow.