Text Box (Multi-Line): How do I make it Read-Only??

I filed a bug in the new system for this, since I just encountered the following behaviour in Unreal 4.22.3 under MacOS 10.14.6:

Screenshot-20190915-at-14.03.24.png

Screenshot-20190915-at-14.03.35.png

Text Box and Editable Text yields two different types of classes, but Text Box (Multi-Line) and Editable Text (Multi-Line) yields the same editable class.

I hope that this is a MacOS specific bug and that there really exists a multi line text box that can’t be edited in 2019 for Unreal.