Soft returns failing in Scheduler notification email preview

In the scheduler feature, in notifications, I'm creating a custom email, And where I want a new line, but not a gap, I insert a soft return.

The preview of the email before saving is showing the layout with soft-returns correctly. But after I hit "save changes", the preview removes all the soft-returns so all the text appears on one line.

Then when I edit it's the same poor layout as the preview. This feels very buggy and obviously a poor experience. Can anyone replicate, and how do I get hold of support to fix it?