66 votes60 comments · Illustrator Feature Requests » File Save, Import and Export · Flag idea as inappropriate… · Admin →
If you will export artboards in any fractional scale or by specifying height and width you will get correct output.
The best way to not get an extra pixel is keep your artboard coordinates in integers. You can achieve that by changing the reference point of artboard to top left and typing in the nearest integer or do Make Pixel Perfect(Object > Make Pixel Perfect). If size of your artboard is increased please manage that accordingly and export.
Thanks & Regards
An error occurred while saving the commentJonathan B commented
I don't think this ever got fixed mine still does it in CC 23.0 Windows. Even if I align the it to be pixel perfect that doesn't always solve the problem when exporting the png.