I have had bad experiences with Opa Locka sorting center in past, but nothing recent.
I have missing package issues in my own area (East coast, Central Florida). Every time I ship orders on Saturday, one goes missing and tracking shows only “a label was printed in city/state/zip”. I only recognized it as a pattern a few days ago, but shipped 5 orders Saturday anyway - hoping for the best. Of course the best was not in the cards - 4 delivered or out for delivery today and 1 missing in action with the label printed statement in tracking.
Anyway, the USPS does much good - for 4 packages to already be at their destination and out for delivery they must be doing something right. On the other hand, I have jumped through hoops attempting to even get this Saturday problem investigated. The packages show-up in Miami or Jax 10-14 days later and then move to their destination. But of course I have had to ship new orders before the original orders show-up. I cannot ship on Saturdays anymore. Sad, but I went back several months and all of my missing package issues involve shipping on Saturday.
FYI - Opa Locka is in a poor area of NW Miami-Dade. I lived there for some time in past.