Build Apps Preview Editable not working

Hi, i noticed since last night, when i preview an app in Build Apps Preview Web there is a selectable dropdown for versions including and editable selection.   On apps where i have a version created,  if select editable i will get the spinner for loading only. However, if I select a version that will preview. apps with no version created, i can get to the current version and view changes dynamically.   Is this a problem others are experiencing?  

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