Will the screen flicker or the animation is not smooth after svga export?

recently made an animation, because some of the actions are not supported in svga format, so using sequence frames instead of
the animation poured out at the speed of 16 frames per second has obvious movement unsmoothness, and the picture quality is consistent with the expectation.
Animation poured out at 24 frames per second, the action is smooth, but 2 frames in each loop suddenly become very bright.
I hope the god who knows can help solve it!

Apr.11,2021

I also encounter this situation of losing frames

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