Editing your post on the Mobile version of the site absolutely does not work and has not worked for well over a year. The only result is that your post gets deleted. As a moderator I can see when this has happened and often will undelete a post that looks to have been deleted in this way. My advice, if you are using the mobile version of the site and make an error in your post, instead of trying to edit it use the Quote option instead and put in your new post the reason why e.g. sorry but meant to say IBS is a banker not a ****er
The recent spate of 'missing' posts seems to be completely unrelated and I've no idea why it is happening.