Mail in OS X 11 does not like having visible set to false and then true

Number:rdar://23290906 Date Originated:28-Oct-2015 02:25 PM
Status:Open Resolved:
Product:Mail Product Version:9.1 (OS X 10.11.1)
Classification:UI/Usability Reproducible:Always
If you create a new outgoing message via AppleScript in OS X 10.11's Mail, and then set the visibility to false and then true, the message flashes on the screen and then disappears.

Steps to Reproduce:
tell application "Mail"
	set newMessage to make new outgoing message
	tell newMessage
		set visible to false
		set visible to true
	end tell
end tell

Expected Results:
The message should appear since visible is set to false at the end.

Actual Results:
Message appears and then disappears.

Version 9.1 (3096.5), OS X 10.11.1 (15B42)





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