From those pictures shown it sure looks like a blade was thrown which could have possibly caused the large nick.
It really would be nice if a picture of the whole compressor blades be shown. For sure it would be known if a blade was thrown.

I've blended many fan blades during my career of aircraft maintenance. And I know what impacts cause what type of nicks on blades from rocks to metal objects. That blade that was lost in the blurry rear portion (2:00 position) of the pic that was posted sure looks like its what caused that large nick. Man, it looks like its right in the path of that damaged (nicked blades) arc.

Could it have been possible that a blade broke off and then bounced off the FOD screen and finally ingested back into the turning compressor which caused the big nick we see posted? I've seen such thing happen before!

Totally agree that this should be settled under warranty.

Kat, I hope this gets resolved for you soon.

Cheers,