jagged or pixelated seams between polygons

I'm experiencing jagged or pixelated seams between polygons when painting in Substance Painter — especially when different UV shells are filled with different colors. It looks like there’s bleeding or overlapping of pixels between neighboring polygons.

I've already tried the following to fix it:

• Increased the texture resolution to 2048 and even higher.

• Switched from regular painting to UV Chunk Fill for more precision.

• Raised the subsampling (antialiasing) level to 8x8 during baking.

• Increased the texel density of my UVs in Maya (was around 67px/unit).

Despite all this, the issue still persists, especially around UV seams.