I am using the latest versions of GIMP and G’MIC. The default arguments appear to be the same but I could not tell you if there have been changes under the hood. Try updating and see if it helps. Hope you find a solution 
I am using the latest versions of GIMP and G’MIC. The default arguments appear to be the same but I could not tell you if there have been changes under the hood. Try updating and see if it helps. Hope you find a solution 