Was this 1 time or it happened several times? All troops are suseptible to RNG, it is just most common for LBMs. If it happened 1x and then not again, just RNG. If it happens consistently, then numbers need to be adjusted.

Kabam sometimes messes with mechanics for a day then messes attacks up temporarily, may be this also. I lost several marches of LJs on level 10 camps because this... something that has been done 1000s of times all of a sudden losses.

And: Cropping works wonder for hiding pictures backgrounds ;)

it only happened once, and cropping? sorry,im dumb with computers

Have you tried again with the same numbers and researches? Crop so you don't have to blackout all the stuff around the image you want to show lol. There's usually a tool in the editor somewhere looks like a black box with a line through it.