Yes i did. I've tested the code in my context. The only way to prevent is imo minimizing the update range and toc or fieldupdating seperately. I have a lot of specifications and constraints in this issue because there are only diffrent types of styles concerned and also paragraphs below Headlines without or different styles but including Stylereffields that belongs to the Headline. Quiet complicated, but at the moment it seems to work quiet good. We're still testing.
Thomas