Stopping at "Switching lists"

I’m currently getting a problem where when I run a build, the project pauses at the point where one action list calls another. The “Run Action List” action is highlighted in turquoise (“Switching List”), but no actions on the subsequent action list have any marked status.

The first action on the called action list does have a breakpoint, but it doesn’t seem to be reaching that. Strangely I ran this build several times and all behaved correctly, and this just started happening. And now seems to happen every time I run it?

Wait, no it’s weirder than that. When I press F10, apparently the project is stepping (values in the Watches pane are being updated, the Build Summary pane is updating as well), but no statuses are being displayed in the Action List view.

If it helps, F10 also seems to be sending the focus to the menu (like pressing Alt) when this happens.

Steve

Update: Closed and reloaded project, problem went away.