Confirmed that this is working as designed (and is known and being worked on)
This is the response:
if it's a Layout template (DND block editor in the design manager) they can swap to a theme template, if it's a coded file without a DND area in the page editor, they cannot
You can be following things while creating a page:- If you have created the custom theme then please select your theme http://i.prntscr.com/qxz5E9dIRKaXPq7RYr1P1w.png If you are using the custom template please check your template name and template label are the same or different if it is wrong then please make it the same name.
Hope this helps!
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Confirmed that this is working as designed (and is known and being worked on)
This is the response:
if it's a Layout template (DND block editor in the design manager) they can swap to a theme template, if it's a coded file without a DND area in the page editor, they cannot