It would appear this is related more to the issue I had last week with “until” dates that were initially falling due in the past. It was something @lubos hadn’t catered for and subsequently issued a fix for it very quickly.
It seems it is now broken in reverse and he may need to revisit his date checking routines. No doubt a fix should be up for this one soon enough, but in the mean time, if you remove the “until” date and have it until further notice, it will issue correctly.