Lines appearing across shapes and text randomly when published

I have a module which is having lines appear across shapes and text. It seems to be located where the boundary box edge of a neighboring shape is. Some times they appear as black lines through objects, other times it appears as if the line has been removed from the object. Any ideas on how to fix this? I know in some situations moving the objects to ensure there are no intersections between shapes does resolve it, however I am unable to do this for all slides.

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