Standard Size with Tinderbox 8.9.2 on bold or italicized text ($TextFont=MercurySSm-Book) removes these attributes. Is this intended?
Standard Font. Sets the selection to the default font ($TextFont). Note that this destroys any bolding or italics as these are set using variant font faces.
however I see the opposite behaviour:
Standard Size destroys bolding and italics,
Standard Font doesn’t.