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IMAQ Merge Overlay issue

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Hi folks, have had this issue for sometime and cannot get to the bottom of it.

 

I have an image which I'm doing some work on, namely, drawing a region of interest (just a series of lines and a rectangle using the IMAQ Draw subVI).  After doing this operation I use IMAQ Overlay Text and then IMAQ Merge Overlay to burn text metadata into the image.  My output image is mostly correct, in that the text does indeed appear on the image, but my ROI lines disappear and my ROI rectangle becomes a different color.  When I comment out my Overlay Text/Merge Overlay code the ROI looks correct on my output image.  What is Overlay Text/Merge Overlay doing to mess with my program?

 

I have toyed with what goes into the 'Image Dst' input for the IMAQ Merge Overlay subVI, thinking that might be the issue, but haven't gotten anywhere concrete.

 

Image one - With Merge Overlay edited out of code.  This looks correct.  

Image two - With Merge Overlay in code.  This looks incorrect.  Notice many lines are missing.


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