Printing is not round.
When the heat bed (Y-axis) moves back and forth, the heat bed can be seen jumping up and down from the side of the heat bed.
Print quality problem.
Please refer to the following link to complete the repair of the linear module.
https://support.snapmaker.com/hc/en-us/articles/1500000110341-What-should-I-do-when-the-slider-of-the-Linear-Module-comes-loose-