Explosion particles no longer render when the player does not have the center of the particle in their field of view

I cannot reproduce this:

I also cannot reproduce this issue based on the current description.
If this requires any additional setup or circumstance to occur, please be more specific in your steps to reproduce to reliably get the same result.

done

I see no issue in your second video, the “disappearing particles” are either going past your camera or into the ground. As for your first video, I can’t reproduce anything like that with any FOV.

I just think that the culling box isn't right for the particle, see comparison with 1.21.8.