Exiting the channel will reset the display. A reboot isn't necessary.
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With some Versions of Roku players you can just hit the * button during playback and toggle the debug window. With others, the * button has to be pressed while on the main view before playback begins, and pressing the button during playback has no effect.
Dan
Roku Stick (3600), Ultra (4640), Ultra (4670), Ultra (4800), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.