Was this confirmed as intentional? If so, I think this can likely be moved out of Bug. (Also a little curious as to the rationale if someone is willing to share 
)
If it is intentional then there seems to be at least two UX/Feature issues here:
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Smoothing out the ux of this ‘dead end’ re-verify situation a user can find themselves in
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Providing a way to periodically force an email revalidation where the users can’t simply switch to a non-authorised email and carry on accessing the site