OK, after researching and looking at the sync logs. I figured that this issue is due to a single (yes single) image pasted previously from Telegram. I think somewhere down the line, my Telegram messages were purged for privacy or something (might be my settings) and thus the image was non-existent. It then stopped the sync from working....
All good now and upgrade to Premium. Happy with Evernote!!!
@gazumped Thanks for the help all this time!
PS Maybe Evernote can actually copy that file over somehow so that even if it was deleted, it still has a copy. Not sure of the tech details though.....