Calendar events not all-day

About a month ago, the calendar events stopped being classified as 'all-day' and instead started at 00:00, lasting 0 minutes. Could this be reverted?

<img width="110" height="67" alt="Image" src="https://github.com/user-attachments/assets/6afbe640-3e69-4383-93b4-09da4e4f0fe4" />