Hi, I find it very confusing that enabling the CLICK button in the Studio Control Room does not synchronize to the CLICK button status on the Transport bar. As a user that uses the Studio Control Room, pressing the CLICK button on the transport bar does NOT allow me to hear the metronome. For me, I have to enable it in Control Room, then I hear it. But when its on (and lit blue), it does not update the status of the one on the Transport bar. 
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A small fix that would make Cubase that much more perfect. Please let me know if this is on the list of fixes to be released in Cubase 8.5… Would be nice if the CLICK button on Transport bar was blue to match the one in Control Room.