arnau fornas

Hello everyone, I am a vfx student who is trying to carry out a grooming project and I have encountered this error, when rendering the first frame the fur is in one position and in the next frame there are some hairs that move, (attached file video), I have tried moving parameters of all kinds and there is no way, the simulation of the guides looks correct, even the guideform too, it doesn't seem to look anything strange.

I also attach the guidesim and guidedeform video.

The delivery deadline is close so if you can help me I would be very thankful.

(What you see in the video not only happens in that area but throughout the body)