Model Became Lagged

Hello Rhino community, I have a long-time rhino modelling question about the display performance. As you can see in the photo, even though the two geometry perfectly line up in the wireframe, their edge is entirely off in the shaded view. Please help me out, the mighty community!

Could I have this 3dm file?

Sorry for the delay, Jessesn. Here is my file, I hope it will help facilitate the conversation.
Lagged Model 20250109.3dm (3.8 MB)

You can give it more display mesh to the objects follow below steps,

You also can click the Details button on the previous picture setting more details, and here is a guide about how to set it,
https://wiki.mcneel.com/rhino/meshfaq