Outside US when PD current

[uimgh]

Hello,

If PD is current, are there disadvantages of being outside US (on AP) ?

Thank You.

[uimgh]

What happens when there is a problem with I-485: Denial or NOID ?
If denial, and in US, MTR can be filed and if MTR accepted, the period (from Denial) is considered as legal stay (even if not maintaining H1b status).
But if denial, and outside US, you can NOT enter on AP. Correct ? Here only option to enter US is H1b ? Here can MTR be filed ?