Layer shift occurs in Y axis

I have been molding with a 3D printer using a new linear module (with engraved marks), but the probability of layer shift in the Y axis has been increasing.

I thought that the molding speed was too fast, and I lowered the movement speed and molding speed to 40mm, but it did not go away.

I can’t find the cause of the layer shift in the Y-axis linear module, and I suspect the linear module.
Is there any way to check it?