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The playback menu will not appear when you switch to the next image in the new beta update.
Please follow the steps to switch to beta version 1.1.5:
Visit SKYBOX VR Player product detail page with browser or Meta Quest mobile app. (Make sure you login to your Facebook/Meta account)
Click "Version" and select "1.1.5 Beta Release: 1.1.5"
Uninstall and reinstall SKYBOX on your Quest.