Thanks for your note.
I disabled 'Use Graphics Processor' and went to make a panorama - 'Creating Panorama' still never disappears, panorama is made and I have been waiting ~1 hour for task in top-left corner to disappear.
Happy to provide a process log or something like this to scrutinize this issue.
Have tried another sets of images Or is it with all images in Lightroom?
I'm not sure what you mean - but I will clarify that the latest panorama I created was not one that was previously created, and I only use Lightroom now so there is no other program interfering.