Since there are reasons to have compatible masters (other than interpolated instance), can you explain why an interpolated instance is needed to get this feature to work?
That, to me, is rather a reason for a bugfix in either the app or the plugin, not for requiring users to keep masters compatible. And it is irrelevant to someone who does not want to interpolate in the first place.
What is the problem with creating an instance if you want to interpolate anyway?
Ok, please consider it a request for a bugfix for the crash and one for the filter.
I still don’t understand why, when I’ve chosen
View > Show Master Compatibility (Ctrl-Cmd-Opt-N)
that I don’t see master compatibility in the Font view. The guidebook doesn’t mention the need for an intermediate instance, so it is a bit of a hidden requirement.
Well they are related insofar as being about point compatibility, but he means that particular menu item does not turn on and off the particular visual indicator you’re looking for (the one in the font window).