Start Date not saved after Completing an entry

[JoeloJoestar]

Steps to reproduce:

1. Have a manga in "planning" and set to "Hidden From Status Lists" and in a custom list
2. Open the manga's detail and set it to "completed"
3. Start date is epoch date or not populated
4. Modify the start date manually and save
5. Open it again and the start date should still be wrong

20240603_022756.mp4

Like I described in the steps, I had this manga in plan and then I saved it as Completed. After that, I noticed the issue with the start date and started to record. You can see in the first seconds that the date was already the epoch time.

[lotusprey]

The start date is not auto-populated because it can't be assumed based on when you finished. As for the rest, I will see what's causing it.