Issue with interacting with media field

[jeremydw]

Getting this traceback when expanding/closing media items

Uncaught TypeError: Cannot read property 'hasLostFocus' of undefined
    at u.hasLostFocus (app.min.js?fingerprint=b7c756565c20b6c0fb6f72eebae52fd3:26)
    at u.ensureValidation (app.min.js?fingerprint=b7c756565c20b6c0fb6f72eebae52fd3:26)
    at u.template (app.min.js?fingerprint=b7c756565c20b6c0fb6f72eebae52fd3:26)
    at l.templateExpanded (app.min.js?fingerprint=b7c756565c20b6c0fb6f72eebae52fd3:487)
    at l.template (app.min.js?fingerprint=b7c756565c20b6c0fb6f72eebae52fd3:451)
    at app.min.js?fingerprint=b7c756565c20b6c0fb6f72eebae52fd3:448
    at app.min.js?fingerprint=b7c756565c20b6c0fb6f72eebae52fd3:1580
    at h.commit (app.min.js?fingerprint=b7c756565c20b6c0fb6f72eebae52fd3:1580)
    at o.update (app.min.js?fingerprint=b7c756565c20b6c0fb6f72eebae52fd3:1580)
    at h.__commitTemplateResult (app.min.js?fingerprint=b7c756565c20b6c0fb6f72eebae52fd3:1580)

On this example