Nashville CBS 5 black lines?

[cpa4u]

Has anyone that has Nashville CBS 5 noticed little black lines going across the screen the last few days? They look like interference lines or something. I'm getting them on 2 different receivers and only noticed on channel 5. They aren't there all the time. Just randomly.

 

[Jim5506]

Top and bottom of picture or in the middle?

 

[cpa4u]

Mostly through the middle.