No, double-checked by running chrome.exe with --disable-extensions. Of note, the same api call works fine from the repository home page, just not on the pull request page (as noted in the original description).
There is no problem scanning - scanning works just fine and the sonar report posts back to the PR in bitbucket.org just fine, so there is a link and status in the builds section for sonar results as well as the SonarCloud Code Analysis in the Reports section. It’s just the summary widget at the top of the PR page that no longer displays.
I understand that it is working. I wanted to try to simulate your use case.
Can you tell me what the call to https://sonarcloud.io/integration/bitbucketcloud/pr_widget_data returns when you open the PR page?
Per our private conversation, there seem to be no errors in our logs concerning your project. So, as suggested, please try re-installing the SonarCloud integration on Bitbucket to fix the issue.