Yes this kind of thing happened to me
So even though the timescale was 0, when I fired a bullet the bullet spawned but didn't move.
I guess I could have tried using a variable like
IF timescale is 1 → timescale_var == 1
And then in the events add
While timescale_var == 1 AND on space pressed (or whatever your one is) → Spawn bullet
I'm not sure whether this will work,
Tell me if it doesn't
Radkampfwagen