Exporting Layers as PNG Retaining Image Size

When I take a PSD and select multiple layers and Export As PNG the images with any transparency get trimmed. I need to know how to avoid this. I am using Photoshop to create texture maps for 3D modeling and have an action setup to process a PSD into texture maps that need to have the same resolution (2048x2048, 4096x4096 etc.) My Albedo and Metallic maps sometimes have transparencies. I am trying to automate this process as much as possible and do not want to have to manually save each layer or have to check each one to make sure it's going to export correctly. I just want to run the action and hit export and know that my files are going to be correct.