what is the cause of "With the selected permissions, you may lose permission-change access to this object" warning

A user who has access to create a document of a certain class, but who is restricted to only Read/Write/Delete (but not permission change) for that same class gets this message if they create a document with "open for editing' checked. They don't get it if they just add a document off their desktop into that class.

What is the cause of this warning? Is it a case that while the document is being created they technically have a permission-change ability that gets removed once the doc is checked into M-Files? I did see that the warning message can be suppressed, I'm just curious about the technical cause.

Thanks