Why does validating my model cause fields in the field map of the spatial join tool to disappear?

JohnBrand

I have a model that works fine.... until I hit the 'validate entire model' button.  When I hit the button, some (not all) fields from my target feature disappear from the field map window in the spatial join tool near the end of my model.  So then I have to reconnect the target features every time to get the fields to show back up in the spatial join field map window.

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