Weird opacity on the animation

i am making a game about breaking blocks and i have an animation for the breaking, i set it to 30 opacity but for some reason instead of being transparent it does this:
20251010-2026-34.2834231

post your events pls

no condition | set the opacity to 30


this is the animation

“If you set the opacity to 0, the element becomes hidden?, If you set it to a lower value like 5-10, it becomes partially transparent. Is there a visible difference?”