We have made a number of changes internally to Hangouts to fix some bugs around link handling on mobile. Not news worthy, but hopefully these bug fixes make things a bit easier for folks.
Did you know that you could share a link to let people chat with you in Hangouts? We use these links for certain invites, but they work if you hand build them and share them too.https://hangouts.google.com/chat/person/
Where the number is your profile id
With vanity urls it's harder to find that, but the easiest way is to use the public api call here https://developers.google.com/+/web/api/rest/latest/people/get#try-it
. Put "me" into the userId field and it will output your numerical id in the response.