Why can we not create a branch from Jira cloud?

[Deleted user]

We have spun up an in house Bitbucket server(5.13.0) as we are moving on premise. We have been running this with evaluation license until we are confidant all is well, e.g. we aren't losing any critical features.

Were just about to buy license when suddenly, for no reason, creating a branch took us straight to bitbucket.org instead of giving us dialog where we select either bitbucket.org or new on premise instance.

I removed the connection to bitbucket.org(deleted DVCS), deleted and recreated the application links to new on premise bitbucket server.

Both sides say connected and are nice and green.

Now we don't even have the create branch from Jira issues anymore. We can see all the previous commits and branches though. We can even browse to them and back from Bitbucket to Jira. 

We just can't branch from Jira anymore...

Anybody know what causes this? It is really frustrating!