Referenced Entity not Updating Correctly When Saved I have node A that contains an Entity Reference Revisions field in it set to display as a Rendered Entity that points to node B of a different content type. 

Initially this works fine. However, if I make an update to node B and save it, the changes don't appear on node A until I edit and save node A again. 

It seems like it should update without having to re-save the parent node. Is there a way around this?
What is the reason you use a Entity Reference Revisions field? Normally this is more suitable for entities edited inline like paragraphs. 

In your case this behavior seems to be what you would expect from this field, because you reference a specific revision of node B and not the latest version you've saved. If you want to do this, then use the core reference field.