As the title say, when updating my project (currently on 2020.2.3f1) to newer versions (tested in 2020.2.4f1 and 2020.2.5f1) some, but not all, the references on the prefabs inspector properties are lost. Uploaded images show the "before" and "after" cases. Please note that the Override of each prefab shows, in most cases, no evidence of Revert option. Most of the cases are Prefabs Variants, but also, normal Prefabs. Couldn't find the pattern of occurrence. Note: I'm using Hierarchy2 asset.