Because of this, it's really hard to pin down a cause (although I'm sure the Bakers could have figured out ways in which it could happen if they'd really pulled out all the stops). Now it didn't do this ALL the time - sometimes a project would load with all settings intact, but most of the time either all of the plugins or a select few of them would load without their settings. I recently discovered that it does the same thing to FabFilter Pro-Q 2 as well - sometimes completely resetting the plugin, other times doing something like resetting my high and low pass filters while leaving the bells untouched. Recently it's been Waves Q10 EQ and Waves SSL Channel, although I've heard other people mention different plugins. I've been pretty vocal about my problems with Sonar obliterating plugin settings, having lost countless hours of work because of it.
Possible fix for plugin settings not being saved?