Crop tool leaves large white edges

[#1]

I am trying to crop a simple rectangle using the Illustrator crop tool and I cannot crop it to the size I want without getting a white border appearing on at least one edge. If I try to crop out the white border it just appears again. I think the issue was already brought up elsewhere, but has not been properly addressed or resolved. See here:
https://community.adobe.com/t5/illustrator/last-update-broke-crop-image/m-p/11412389?page=1#M243315

and here:
https://community.adobe.com/t5/illustrator/appearing-white-line-when-using-crop-image/m-p/9016209?pa...

I am using Illustrator 2020 24.2.3 but this seems to have been an issue in previous versions as well. What is going on?

[#2]

I am trying to crop a simple rectangle using the Illustrator crop tool and I cannot crop it to the size I want without getting a white border appearing on at least one edge. If I try to crop out the white border it just appears again. I think the issue was already brought up elsewhere, but has not been properly addressed or resolved. See here:
https://community.adobe.com/t5/illustrator/last-update-broke-crop-image/m-p/11412389?page=1#M243315

and here:
https://community.adobe.com/t5/illustrator/appearing-white-line-when-using-crop-image/m-p/9016209?pa...

I am using Illustrator 2020 24.2.3 but this seems to have been an issue in previous versions as well. What is going on?

[#3]

What are you trying to crop, a linked or placed image?

What is the zoomlevel you are using in your image?

[#4]

It's an image copied out of a placed PDF after embedding. I am working at around 300% zoom.

[#5]

The issues you relinked were about a single visible white pixel, what you show looks like more. 

[#6]

I agree, it does seem to be more than one pixel. Do you have suggestions about how to solve the issue?

[#7]

I cannot replicate that.

Did you try to uncheck "Enable Content Aware Defaults" in the general Preferences?

[#8]

Yes, the problem still happened with that option unchecked.