lapasoa
CW bakers have to put a marker "start" and a marker "end" and you can stop the project where you decide your project ends.
You know I don't always agree with everything you say

...But that's a pretty good idea.
Just double check your project, maybe an automation node or something like a clip is way down the timeline. (Go all the way to the end).
If your problem is playlist, I have nothing to say.
If your problem is with export, just drag select in the timeline to make the projects timeframe.
I use Project >from here / project> thru now function myself.
What exactly are you tying to do/ what is your problem ? Maybe I can help.
I know sometimes its easier to just say "Its a bug" but I might be able to help you find a solution.