Re-introduce latent blending step from the vanilla inpainting procedure.

modules/processing.py

@@ -1597,6 +1597,9 @@ class StableDiffusionProcessingImg2Img(StableDiffusionProcessing):
 
         samples = self.sampler.sample_img2img(self, self.init_latent, x, conditioning, unconditional_conditioning, image_conditioning=self.image_conditioning)
 
+        if self.mask is not None and self.soft_inpainting is None:
+            samples = samples * self.nmask + self.init_latent * self.mask
+
         del x
         devices.torch_gc()