MainStage 3.4 layers issue

Hi Guys -- The new 3.4 update is really surprising me with some bugs. I haven't had any issues with a MainStage update since Spring 2012, and this update is making a real mess of several of my patches. Specifically a few of my patches that have numerous LAYERS and/or SPLITS in the keyboard -- some layers are NOT playing and also may not be visible in the Layer Editor. SOLUTION (so far it has worked): When I open the Layer Editor, then select the CHANNEL STRIP of non-playing layer in the Channel Strip Window, the missing layer then appeared in the Layer Editor window, then I adjusted the range of that layer up/down and then returned it to its desired location. Mysteriously, the layer then started working as normal again. Very frustrating and frankly alarming since I have shows coming up this weekend and I'm not 100% confident my MainStage concert is stable.