Editing a post with the inline editor for users with 2K+ reputation leads to the following weird behavior:
When you edit and save your edit, it asks you if you want to abandon your edits - as if you hadn't changed them. If you select Yes the edits are saved and the edits are not abandoned. If you hit Cancel, the post vanishes until you refresh.
Tested on Chrome on Android and Windows (bug demo on Android).
The issue has been reproduced on most supported browsers across the network.