Thanks for reporting this. We’ve investigated, and it’s actually a bug with AfterAction script events for the Run Action List action. That script actually runs before the child action list runs, it’s a limitation of the stepping engine in FinalBuilder.
The bug is present in FB 5 and FB 6. The workaround is to put a Run Script or similar action after the Run Action List action, like you did.
I’m not sure what we can do to fix this. Previous FB versions had that script event locked-out, but due to backwards compatibility we’re reluctant to do that again - in case people are running scripts there.