PT 11.3.2 Delay Comp issue

[quadraphonics]

All,

I am hoping that the collective group can help me with an issue I am having.

One of our PT:HD rigs (11.3.2) is having a delay compensation issue. We are attempting to using an AUX channel as a processing chain for noise reduction. The AUX contains an EQ, NR, DeEsser and Compressor and is fed by a few audio tracks. The AUX, in turn, feeds a DX Sub Bus for Printing of stems.

This works fine in 4 of our 5 mixing suites. In one room, trying to do an Offline bounce causes Pro Tools to crash. Deselecting the 'offline' option allows me to bounce these tracks, but all of the other stems (VO, MX, FX) are printed early by varying degrees (several frames according to the 2-pop).

Removing all of the plug ins from the Dx-Process AUX makes everything print correctly, but I obviously lose all of the processing.

What is going on and how can I fix it?

This is a Mac Pro (non trashcan). 10.8.5. 48GB RAM. Using internal SSDs.