This isn't necessarily a XFMG bug but if I add image metadata in Windows 10 (Details pane or Image Properties) I am unable to upload the image, it simply hangs and never times out. No errors in server log.
That's a good point Brogan. It seems there is a problem on my side. If I add metadata to an image in Photoshop everything is ok.
I am sorry for the inconvenience.