The bug
When you set the the title times all to negative value it acts like the /title ... clear command.
Expected behavior
The /title command should not allow negative time values.
How to reproduce
- Set a subtitle
/title @a subtitle ["Subtitle"] - Set all title times to negative values
/title @a times -1 -1 -1
- Display a title
/title @a title ["Title"]→ You will notice that the subtitle is not shown