We have a Napili template on our community here. When a user clicks on this link from the twitter app on iOS, they get a message: 'Invalid Page' as described here. When they open in Safari, the community loads as expected. The problem seems to be with iOS webview (is this supported by SF?) or with the Community config somewhere.
Has this problem been reported elsewhere and are there any known fixes/workarounds besides for asking users to open with their browser?