House borer? Wood-boring beetle?

[Trollöra]

Bought a cabin and after a few weeks, all worst case scenarios have started…
Parts of the exterior paneling have streaks like in the attached pictures. Could this be early signs of wood borers, such as house longhorn beetle? Signs of hollow tunnels before the flight holes. Or is it simply damage in poor quality paneling?

 

[Avemo]

To me, it looks like something that was there when the panel was painted. Maybe the center of the log from which the board is sawed.

 

[Trollöra]

"To me, it looks like something that was there when the panel was painted. Maybe the center of the log from which the board is cut."

Thanks for the feedback! Indeed, that's what I hope for!
Even though better material would have been preferable!