Weird smoke trail

Question

I was wondering why most flights at any time of the day but not night time I can see a weird black/grey trail that doesn't seem to move. When I look at the map there is no aircraft shown where I can see the trail from. (Yes I have zoomed all the way out on map to try and see but nothing in the same area as the trail is there.

Has anyone else experienced this?

Cheers

Comments

Attaching a screenshot of the issue might be most helpful.

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Okay Cheers,
I have taken a closer look at them and figured out that they are actually contrails from another plane but it is not working properly. I looked at one while still on the ground and watched it and it stayed in the exact same place for maybe 2 minutes before jumping forward a bit and doing the same again. What it looks like to me also is that there is a plane on fire and has a smoke trail behind it rather than a reasonable while contrail that is long and thing rather than thick and pretty short.