It's hugely upsetting when that happens and we have no idea why. I usually don't have trouble with blues or splashes hatching, but have a lot of problem with lavs. 12 lav x lav/splits should hatch Thursday or Friday, and then 9 that are lav x lav and lav x buff should hatch 3 days later. In two different bators. Hope they come through.
I have two beautiful splash showgirl hens--one with bowtie, one without--and hope to have some splash SG babes this season.