Bitbucket branched from wrong repo after making and deleting a first branch in another repo

**I just experienced this problem twice in a sprint.

Reproduce:**

1. in Jira task - select "create branch"
2. select branch to create from: Repo A
3. oh no! user made a mistake. User wants to delete branch.

  + new branch is not visible on Jira task, why not?

— user goes to https://bitbucket.org/my_group/my_org/branches/

— branch is not active because it has no commits, so user selects the "merged" tab

 + this makes no sense - it's a new branch, not a merged branch

— now user deletes the branch

1. user returns to Jira task and selects "create branch"
2. select branch to create from: Repo B
3. user does a lot of work and makes PR to merge to Repo B
4. Repo B breaks, because the branch was from Repo A, which contains incompatible changes

This caused great frustration for my team on 2 different tasks.