Why are my images that I am uploading getting fragmented or getting destroyed even when my original image is perfectly fine?

To replicate this issue, an image from my device is uploaded to a website that requires an image file input; the resulting image displayed on the website becomes corrupted and unreadable. The theory forming currently is the website is having issues retrieving or reading the input images; however, this bug seems to be consistent with several other websites, indicating Firefox is not able to read the images correctly and thus could result in fragmentation. - The image posted is a .png file of a screenshot of an attempt to post a picture to social media, based on the functionality of this bug, I am predicting this image will be fragmented and will only show blue and black lines. The image being posted online is also in a .png file format.