Share Extension: dialog may sometimes render empty

Using riot-ios 0.6.12.

The "Share" feature would work most of the time.
In fact, it's only once that I've seen it render empty (as seen on the screenshot below).

This is while trying to share a URL from Firefox.
The first time, it worked and I managed to Share with some "Person". The 2nd time, it rendered empty like this.


I haven't been able to reproduce it since then.

Start with the Share feature in riot-ios 0.6.12 and investigate the iOS share extension flow when sharing a URL from Firefox. Compare the first and second share attempts described in the report and use the attached screenshot as the observed failure state. Done means identifying why the dialog can render empty and preventing that state.

Written by the indexing model from the issue text.