Does the "welcome" activity work when a user is given an additional usergroup, or do they need to change their primary? I tried testing and it seems like it does when you manually put them in it, but then I couldn't get it to work when a promotion gave them the additional group. But the...
Updated to v3.1.9pl3, Fixed an issue causing PHP warnings in certain scenarios, but promotion not fully completed, the remaining part of the members will not get a promotion. :(
before was working on v3.1.9pl2.