Yes, it is still an issue. I didn’t see the “The last post in the topic is already ..” red warning, but it is definitely the case that if you go to that pulldown and X to leave, it still sets the auto-close topic after last post setting and closes the topic!
And these timers still use the old method to choose the duration, which is not really a big issue and on reflection may even be better because you can set the duration in hours, days, weeks etc.