Visual filter exerts unnecessary effort

When I open a visual filter that is already applied to the text, the markings for the filter are removed and reapplied. This doesn’t need to happen on an open. If I make changes it needs to update but otherwise ...?

Software version: 4.0c SR1.
Reported by MJ Smith.
Forum link: http://community.logos.com/forums/t/17398.aspx
Status: confirmed