Are packages getting stuck at the Jackson Post Office the new normal?

I’ve noticed since Christmas that packages for items that I order and shipped via USPS are consistently getting stuck at the Jackson Regional Post Office from 4-11 days instead of a normal process flow of getting to the next (and last) post office within 24 hours, and it seems like that they don’t always follow FIFO in many cases. Is this really the new normal? Is anyone else having this issue, too?