Can parallels affect delta time on prerender loops?

Sooo i got a prerender loop and i am rotating part’s X axis,
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i also add up every loop
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the problem tho is when i print math.rad(Projectile.Spin) * dt:
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it doesn’t go 1,2,3,4,5 as expected but rather 1,2,5,3,4,8,5,9 and so on:
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is there any solution?