I'm translating the article w:en:Moon from en to ro. Like many times before, saving, exiting CX, reopening CX and reloading messed up the translation: missing paragraphs, spurious huge separator divs, spurious references sections all over the place. Not a disaster, the data loss is the worst, but it's not huge, only a couple of paragraphs. I can usually reset this by publishing what can be saved, deleting the translation, and starting over a new translation and working only on the rest of the article.
Only now I can't delete it.
I go to the published translations space, resume the translation, allow it to be saved in the translations-in-progress space, exit CX entirely, reenter it and attempt to delete the translation. Its line just becomes grayed out and nothing happens. No error in Javascript console. If I reload, the translation is back in the published translations list.
PS: The same thing happens to me with the w:en:United Kingdom translation. There is even no data loss there, I had just published the draft before exiting, but now the structure of the translation page is a mess and I cannot restart.