Glitch when exporting pattern as PNG

[GeorgeMendes]

Hello everyone. I'm having trouble exporting a pattern as a PNG. Every time the big downward pointing triangle repeats down the image a rectangle appears in the top right corner of the triangle and gets larger each time. There is no rectangle there in the pattern and it doesn't appear within Illustrator nor does it show up if I export it as a JPEG. Any ideas how I can fix it? Unfortunately it has to be a PNG file so the JPEG work around doesn't help. I'm pretty new to Illustrator so really grateful for your help!mobdro https://pnrstatus.vip/ https://sarkariresult.onl/

[ShinDesigns]

I think exporting it into psd then save it as png in photoshop ? I hope we are on same page. lol