UV problem and model for simulating tree cutting

[Esmael]

Hello everyone, good day!
I’m working on simulating tree cutting with a saw. I imported my tree model, removed unnecessary parts, and used the PolyFill node to close any open areas in the model.
Next, I added a group and separated the edges that are being cut to apply subdivision (since the polygon count on the edges was low).
Then, I used the TimeShift node to freeze the tree at the first frame (because the tree is animated) and created a mask attribute for it, setting its value to 0.
On the other hand, I imported the saw model, created a mask attribute for it as well, and set its value to 1. Using the Attribute Transfer node, I separated the areas where the saw moves on the tree edges. For the tree animation after the transfer, I added a copy attribute and applied the animation.

Now, at this stage, the edges on the upper part are a bit messed up and ruining the result.

My guess is that the issue is with the UVs or the PolyFill.
I went into the PolyFill, enabled the group, and created UVs using the UV Texture node, but the problem still persists.
I also tried using Normals and Boolean, but I didn’t get the correct result.

I’d really appreciate it if you could share any solutions or ideas. Thank you!