gegl:crop with other ops loses content when used on adjustment layer groups
src-in aux=[ color opacity value=0.4] crop
is syntax you can enter in Gimp's GEGL Graph. If you use this syntax in an adjustment layer group its content will turn invisible until the crop is removed. Once the crop is added the effect will work again. A few plugins of mine use syntax like this to do background design. It also seems that native Gimp filter json:grey2 and recently added Styles are affected by this.
The goal of this post is to make it where GEGL syntax listed above does not create a bug on adjustment layer groups. Crop alone does not create this bug, only when it is clipping out a render filter with other stuff present.