Getting the following error when trying to build pull requests after upgrading to Bitbucket 7.6.0:

 
{{> C:\Program Files\Git\bin\git.exe fetch --tags --force --progress – REDACTED_URL +refs/pull-requests/:refs/remotes/origin/pr/ # timeout=10}}
{{ > C:\Program Files\Git\bin\git.exe rev-parse "refs/remotes/origin/pr/140/from^{commit}" # timeout=10}}
{{ > C:\Program Files\Git\bin\git.exe rev-parse "origin/pr/140/from^{commit}" # timeout=10}}
{{ ERROR: Couldn't find any revision to build. Verify the repository and branch configuration for this job.}}

I've tried pulling the ref manually, and while some of the older refs are there, pull requests made after the upgrade are not. Is the ref no longer available? I understand that may be "Bitbucket's fault", but if the mechanism this plugin uses is gone, then isn't the plugin broken?