[Inyo-Mono]

I often see airliners flying overhead my home at 35,000 feet with no contrails and every once in a while a Contrail will disappear just like the one in the gif posted. The grids in my area are formed by planes flying west and east and others flying north and south on regular routes.

[E. Pluribus Unum]

I often see airliners flying overhead my home at 35,000 feet with no contrails and every once in a while a Contrail will disappear just like the one in the gif posted.

And that is of no interest to you because you have the curiosity of a potato.