Hi!
I've found other threads with similar problems. I tried the advice, but nothing fixed the problem.
My problem is that even though I align my symbols there's still a visible line where the symbols meet. You can see the white lines on the black. Sometimes there's black line in the white area. I couldn't replicate it this time. It's not just a display error, because when I save out a png or if I use the "merge visible" option on ipad, it' still visible.
I ticked the "use precise clipping" in the performance preferences. I also tried the "force pixel alignment" with "move by whole pixels" on and off. Neither worked. I can't add a stoke, because that's visible all the way, not just in parts. If I place something in the symbol, but not in the triangle shape of the symbol, it works fine without the lines. But unfortunately I need the shapes to stay inside the triangle shape of the symbol. This way the lines stay visible.
For now, I draw over the parts after I save them out. But it would be great if they would just come out without the lines, so I don't have to go over them 😀
I attached the affinity file of this image, so you can play with it:
lines example.afdesign