We've pushed out a fix that hopefully resolves issues that some users have reported in regards to Bitbucket VC profiles not working as expected.
This fix does require that you create a brand new Bitbucket VC Profile in connection profiles > VC profiles.
After you add the new Bitbucket VC profile, go to the web apps that are associated to the old vc profile and then update them to the new one and fill out the repo / branch-to-deploy info.
We hope this resolves the issue! Send us an email at firstname.lastname@example.org if you continue to have issues with Bitbucket.
We apologize for the inconvenience!