Persistent Focus Rings on TESOs

I have a series of Text Editor Super Objects for which I have enabled the focus ring option. But the focus rings do not disappear when the focus leaves the object; they just keep accumulating (see screenshots). I’ve tried closing and reopening the database, and have tried switching to a different form and then back again (clears the focus rings, but does not stop the problem from recurring). Any ideas why this is happening?
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