When opening a large pull request, some files are not loaded.
There is a button "Load all failed diffs" added by Redefined Bitbucket.
After loading all failed files, they all are displayed as unreviewed.
When a new change is detected in PR, and the notification "Pull request updated" in the bottom-right corned appears, all files become displayed correctly.
I believe the newest release probably fixes this issue. I'm going to close this issue, but if you find that it isn't fixed, then let me know and I'll reopen.
When opening a large pull request, some files are not loaded. There is a button "Load all failed diffs" added by Redefined Bitbucket. After loading all failed files, they all are displayed as unreviewed. When a new change is detected in PR, and the notification "Pull request updated" in the bottom-right corned appears, all files become displayed correctly.