Acrobat Crash during PitStop Preflight

Hi Community,

I try to debug an annoying problem with Acrobat Pro on Mac in conjunction with Acrobat Output Preview and PitStop Pro. If an user opened several PDFs and do a color check in output preview, followed by a preflight check with PitStop Pro (version 9 and above) bit by bit, Acrobat crashes maybe after the third or fourth PDF.

Here is a link to an exaple crash report: AcrCrash - Pastebin.com

Is there anybody out there who can help with a clue to fix that problem?

Thx in advance & Bye Tom