images with .jpeg extension are not resized (.jpg works)

[dwenaus]

images with the .jpeg extension that are missing filetype data are not resized using wp image resize functions

for example, if you have an image that is missing filedata that is called image.jpeg it will not be resized with the_post_thumbnail(). however change the name of that image to image.jpg and it will work.

images with proper filedata named .jpeg do get resized.

Couldn't reproduce this with a JPEG stripped of header data with ​jhead's -purejpg flag and a Windows Xampp install with GD installed.

Can you attach an example image to reproduce with? Found #16458 while looking at this and is possibly related.

i tried to replicate it again, on a different server, and had no luck, so close this i guess.