Still being assigned to an existing game even after it's finished.

What the title says. This has happened to me twice now, and I think the problem lies when you skip waiting for the results while the post game lobby begins to load. Long story short, the Nexus is destroyed, press the continue button, instead of waiting for the results I instead skip it, create a new game, message pops up saying, "you are currently assigned to an existing game". Wanna have a peek at this please?