Shortlinks for invite codes do not show 'Open Room' when pasted into the spaces

[misslivirose]

Instead, the short link gives a blank gray-blue rectangle and shows 'Open Link' when 'Open Room' is expected

[misslivirose]

Update: in trying this again, shortlinks for invite codes now do not resolve at all.

Repro:

1. Open the 'Share' button
2. Paste the hub.link url into a room

Expected: the url resolves to a Hubs room and shows 'Open Room'
Actual: broken link image

[johnshaughnessy]

I only fixed the client side of this issue by changing the regex that recognizes a room link, but there still seems to be a problem that if I post a room link without an https:// prefix, the media won't resolve with a thumbnail for the room and instead it will be a broken image.