Adobe Illustrator pathfinder tools are creating odd bumps and glitches in the divided paths

Question

I have two shapes. After using the "Divide" pathfinder option, I am left with an uneven shape. The attached image should be more clear.

Before pathfinder: overlapping shapes before

After pathfinder: overlapping shapes after

Zoomed in: overlapping shapes after and zoomed in

Any idea what's going on?

Do you have align to pixel grid enabled? Try switching it off. — Billy Kerr, Oct 14 '17 at 15:12
In the Pathfinder Panel menu... Choose Pathfinder Options... -- What's the Precision set to? (Like Billy suggested.. it looks as though Align to Pixel Grid is on). — Scott, Oct 15 '17 at 14:59

Alin · Accepted Answer · 2017-10-15 08:59:27Z

I can't replicate your issue. I have gone as far as creating the same shapes as you have.

It must have something to do with how you created those shapes...let's try something:

Make sure each shape is not in a group, if they are, ungroup till all shapes are by themselves.
Go to object > Expand Appearance or simple Expand.
Try to Divide again.

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