Problem with choppy particle life

I’m trying to make a particle system that emits something firelike. However, every 3 seconds or so, there appears a choppy motion and it seems like the system changes entirely.
What do you think I’m doing wrong?
https://streamable.com/qzt0o

Since this didn’t really get traction, I’ll answer my own question here.

The choppiness only happens in the editor. It works fine when playing.