I have created a ticket with ID IMAGINGNET-4394 in our issue tracking system to further investigate and resolve the issue. This thread has been linked with the issue so that you may be notified once the issue will be fixed.
We have tested this issue with latest Aspose.Imaging 21.3 and this file loaded and exported in 2.535 Seconds. Can you please try the shared version and in case the issue is reproduced then please share the the information about your hardware and Operating System environment?
I am still experiencing the library hang when using the attached original JPG (zipped to avoid the image being altered), with v 21.4: input.zip (3.3 MB)