Behaviour - Text is collapsing to a single line if a style is altered and the text contains a soft enter (Shift+Enter)
Steps to reproduce
Create a new document.
Add a text box and type some text. At the end of a line hit Shift+Enter to create a soft enter (Soft enters in Word/InDesign are used to show a line break without starting a new paragraph. It operates as expected in Publisher until you try to edit the leading override.)
Apply a Text Style. For example "Body"
Edit the Text Style. Character->Position & Transform->Leading Override. Default shows "0 pt" (Which is incorrect it should be displaying "Auto". Set this to anything and hit okay. Edit it again and try to return it to "0 pt" causes it to correctly collapse to "0 pt". Change to "Auto". While the drop menu is open and hovering over "Auto" it shows the expected result. However clicking on it causes it to collapse the text as if "0 pt" was selected instead. "Auto" cannot be selected no matter what I do.
Windows - Affinity Publisher v1.4.1.404