When you return to the wiki, the draft is in recent a a skinny tiddler. If you transclude the tiddler into another new tiddler it will force a load and then the draft text will be present…
i think, maybe the problem caused by network fluctuations, when it works wrong, my wiki (has 153 tiddlers) takes more than one minutes to load
i tried to limit the internet speed, “error” occurs again, all things i do is wait, wait for the _is_skinny field to disappear on its own. if click ok or click cancel or enter new text before the field disappears, the data is really lost. (i don’t know when I turned on the browser’s network limit and forgot to turn it off)