Your message is not very clear: with "this morning update" are you saying that it used to work until yesterday, before the 1.3 update, that you run that 1.3 update only this morning, or that you already updated to 1.3, it used to work, but it doesn't this morning ?
I can see the baggage loaders on the PMDG 737-600 just fine, and nobody else reported missing baggage loaders so, please specify more clearly:
- your airport
- the gate used
- the exact sequence of operations you asked