So a bit of detective work, curtiousy of roxanne.
"I think I found the source of the trouble.
The EET version includes an attempt to add the Bremen areas to the EET worldmap and in that process removes the original travel triggers.
The issue is that this is done without checking the worldmap in use for the overall installation and if other mods require BP-BGT_worldmap, it does not work. The old triggers are removed but the areas are not on the worldmap.
This *improvement* was implemented on wrong assumptions and should be corrected."
I have no idea if the mod author is still active, but maybe if he can see this it will be correct for future installs/runs