illustration visual glitch

so, when I attach an illustrator file as a png or ai file on dimension a certain part of is invisible, it looks like someone erased a part of the circle or rectangle as visible in the screenshot. however, the png file and ai file is absolutely clear and good to go. i have tried to reduce the size and attach each element seperately also. however, this doesn't happen if the size of the box and its content is big enough(image attached). idk what to do and why is this happening!