Width of the link is changing when I am moving it on canvas

See the below image. The width of the links is fluctuating.

With lesser with

Screenshot from 2023-11-08 15-42-43

With Higher width
Screenshot from 2023-11-08 15-42-38

??? Could you please highlight what is different that you are not expecting to be different? I don’t see any meaningful difference.

What has happened between the first screenshot and the second one?