iPhone with GC version 9.15.0
Windows 10, multiple PC’s, Google Chrome browser
I also am experiencing this problem, for me it began at the start of July. My steps are the same, log the draft in the field and add a photo. When back home on the website on a PC, open the drafts page and log the find. I typically add the description, at which point the photo is showing and in full colour. I click submit and it remains stuck, and never finishes. A log is added to the cache page with just the text, no picture. Everything from then on is out of sync. The draft remains in drafts (usually) on the website. The draft remains a draft on the phone app. A smiley will appear on the website (once the draft is deleted if necessary). The phone app will forever show the cache in draft, both in the drafts page and uses the draft symbol on the map.