On Demand movie goes to PIP and Have to Unplug Box to Exit the "Stuck" PIP

This has happened several times over the last couple of years.  I selected a movie to watch, agreed to buy it and when the movie started, instead of starting on the big screen, the movie started in a PIP window that there was no way to get to.  I tried swap, i tried channel up and down, powered off the tv and cable box, but all for not.   I had to unplug the cable box, wait for it to reset, go back into on-demand and resume the movie before it would work.  Based on other posts, i am not the only one with this random  issue.  What is being done about it!