True, it's likely a bug from either the disc or the player but if they weren't attempting DRM I wouldn't have the issue. Inconveniencing legitimate users because you can't implement the protections without it breaking isn't the way to go.

I know I can download a copy of a film, push play/pause and it will just work. I know if I buy a dvd I'll have to sit through unskippable piracy messages and ads and not be sure the film will play after pausing.