Samsung plasma issue

[Boobtubeman]

30-35 minutes into running, it develops this blue dot pixelation shadows over light scenes.
If i use menus, youll see the ghost of them in blue pixels after the menu is exited...

My camera has a hard time showing them, but hopefully, you can get an idea from the pictures i tried to take..

Obviously somethings getting warm, but what? is this a typical issue with this model??

Thanks...

SR