And btw is there a 100%-reliable way to postpone the meeting with the outpost liaison?
For some reason the don't-get-a-barony-until-caravan-leaves bug is still present in .25.
Nobody else is seeing that bug in .25. Why do you think that the behavior you're seeing is caused by a bug that has already been fixed? It would be much more reasonable to look for other causes.
I'm trying to get a barony in the first year
Well, let's look at the requirements:
20 population
100k created wealth
10k exported wealth
The second one is the only one you can directly control. Let's assume you manage to make 100k worth of stuff in the first week. This causes (relatively) huge migrant waves to come to you in summer and autumn, and you manage to hit 20 population before the autumn caravan (and liaison) arrives.
But now what? You've got 0 exported wealth. So when you talk to the liaison, you are not eligible to become a barony.
You are therefore delaying the meeting with the liaison not because of an old bug that's already been fixed, but
because you are trying to delay the tallying of your exported wealth. The caravan has to leave the map with your exported goods in order for them to be counted as exported wealth. Therefore you have to delay the meeting with the liaison until this accounting tidbit has been registered. This is not a bug. This is simply the only way to meet your stated goal.