I think if it sets a collection to null there may be a serious issue. On my version 1.2.3_snapshot that comes with RAD 7.5.x, I have seen it happen that even if I initialize a oneToMany (OTM) var to a collection, then it gets set it to null when an existing entity is loaded. Much worse, any attempt to assign a collection to the variable gets ignored, presumably due to bytecode modification. So even a lazy init of the var in a getter wont work. Which makes it impossible to add an element on existing entity OTM. That may be on detached entities only, not sure...
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