Crop Allow growing does not resize the layer, it only resize the canvas
Thus after Allow growing crop-resize, you need to do a right click in the layer stack on the layer you want to use and select Layer to Image size, then you can fill
(or you can select your layer in the layer stack and go to the menu Layer ➤ Layer to image size)
Thus after Allow growing crop-resize, you need to do a right click in the layer stack on the layer you want to use and select Layer to Image size, then you can fill
(or you can select your layer in the layer stack and go to the menu Layer ➤ Layer to image size)