Journal streak reset after iOS 27 update

Updating to iOS 27 broke my Journal streak.

I had a 124-day streak, but after updating my iPhone to iOS 27, Journal recalculated it and now says the streak starts on 22 August.

My Mac, while still on the previous version of macOS, continued to show the correct 124-day streak using the exact same synced Journal history.

I have now updated the Mac to macOS 27 as well, and the same incorrect recalculation has appeared there too.

I did miss 21 August, but under the previous Journal behaviour this did not break my streak.

The iOS 27 and macOS 27 updates appear to have retroactively changed how Journal streaks are calculated and erased months of displayed progress.

All of my Journal entries are still present and syncing correctly. The problem is specifically the streak calculation.

This is incredibly frustrating. A feature designed to reinforce a long-term journaling habit should not retroactively wipe out a 124-day streak after an operating system update.

Please investigate this and restore the previous streak behaviour, or provide a way to correct incorrectly recalculated streaks.