White lines on the print

[Cynthia lesExpertsImmo]

Hi communnity.

I am having troubles with the In Design software.

I know it happens to export PDFs with sometimes white lines that shouldn't be there, which when they are printed disappear (picture1).

But this is the first time that in addition, there are also some in the print (and not necessarily the same) (picture2).

It's been happening to me for 2 days now.
I did some research on the forum. I tried to export in PDF/X-4, didn't work. The file haven't been opened in ID then in PS, etc...just ID.

Do you have an idea how could I fix it?

Thanks for reading me, have a nice day.

[Cynthia lesExpertsImmo]

Great explanation ! Thanks again for your time !

[Cynthia lesExpertsImmo]

Well...thanks all of you for your help.
I changed nothing, but tried to print anyway, see if I could had more luck today...
...no hairline stroke this time.....................................
Ok...no more problem it seems, but I didn't understand what was that.
Big thanks again.
Am i supposed to close the subject in this case ?