HI, you got no problem in standalone? Only when you build the project?
Can you show an image from the same view from where it looks normal and where it looks wrong?
Else you could try pin it down but that may take time. So
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Does this only occur in this specific map or does it also occur in a different map of the same project?
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If it only occurs in this specific map, then if you create a blank project and migrate the level there does the problem still occur?
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If it not only occurs in this specific map, then again if you create a blank project and migrate the level there does the problem still occur?
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When you cooked your game did you do this in this project, or did you create a blank project, migrated the relevant assets over and cooked from there?