For workers who are producing copyrightable output if there is any overlap between the types of things they are doing for simultaneous employers there could be

For workers who are producing copyrightable output if there is any overlap between the types of things they are doing for simultaneous employers there could be questions about who owns the copyrights. E.g., if you wrote very similar web code for both Meta and Tinder and one of them noticed and sued the other for copyright infringement things could get awkward.