Yes, this is probably it, this picture was taken (and all impacted so far) some half a year ago and more, so most likely it is old jolla exif bug, pictures taken with the app have no such bug (they are shown correctly in gallery)

edit: yea, old pictures not taken by jolla camera - display/upload correct, taken by jolla camera - display correct in gallery view, turned left-rigth when uploaded to twitter, seems like jolla bug (unless touching by the app is also needed edit: yeah, untouched pictures from gallery display correctly after uploading, so the 'touching' by textractor is involved)