diff --git a/rtdata/languages/default b/rtdata/languages/default
index 55290284d..011404400 100644
--- a/rtdata/languages/default
+++ b/rtdata/languages/default
@@ -2133,7 +2133,7 @@ TP_LOCALLAB_LMASK_LEVEL_TOOLTIP;Give priority to action on midtones and high lig
 TP_LOCALLAB_SCOPEMASK;Scope Mask DeltaE Image
 TP_LOCALLAB_SCOPEMASK_TOOLTIP;Enabled if Mask DeltaE Image is enabled.\nLow values avoid retouching selected area
 TP_LOCALLAB_MASFRAME;Mask
-TP_LOCALLAB_MASFRAME_TOOLTIP;For all masks.\nTake into account deltaE image to avoid retouching the selection area when sliders gamma mask, slope mask, chroma mask and contrast curves and levels contrasts curves are used
+TP_LOCALLAB_MASFRAME_TOOLTIP;For all masks.\nTake into account deltaE image to avoid retouching the selection area when sliders gamma mask, slope mask, chroma mask and contrast curves and levels contrasts curves are used.\nDisabled in Inverse
 TP_LOCALLAB_WAMASKCOL;Mask Wavelet level
 TP_LOCALLAB_CSTHRESHOLDBLUR;Mask Wavelet level
 TP_LOCALLAB_LAPLACC;Mask Laplacian solve PDE
diff --git a/rtengine/iplocallab.cc b/rtengine/iplocallab.cc
index da3ea3a85..a8a421f0d 100644
--- a/rtengine/iplocallab.cc
+++ b/rtengine/iplocallab.cc
@@ -7303,7 +7303,7 @@ void ImProcFunctions::Lab_Local(int call, int sp, float** shbuffer, LabImage * o
             int shado = params->locallab.spots.at(sp).shadmaskbl;
 
             if (shado > 0  && (lp.enablMask || lp.showmaskblmet == 3)) {
-                ImProcFunctions::shadowsHighlights(bufmaskblurbl.get(), true, 1, shado, 0, 40, sk, lp.shcomp, 0);
+                ImProcFunctions::shadowsHighlights(bufmaskblurbl.get(), true, 1, shado, 0, 40, sk, 50, 0);//50 middle value for highlight tonal width
             }
 
 // deltae Mask with scope
@@ -10772,7 +10772,8 @@ void ImProcFunctions::Lab_Local(int call, int sp, float** shbuffer, LabImage * o
         }
 
 //inverse
-        else if (lp.invex  && (lp.expcomp != 0.0 || lp.war != 0 || (exlocalcurve  && localexutili)) && lp.exposena) {
+
+        else if (lp.invex  && (lp.expcomp != 0.0 || lp.war != 0 || lp.laplacexp > 0.1f || params->locallab.spots.at(sp).fatamount > 1.f|| (exlocalcurve  && localexutili) || lp.showmaskexpmet == 2 || lp.enaExpMask || lp.showmaskexpmet == 3 || lp.showmaskexpmet == 4  || lp.showmaskexpmet == 5) && lp.exposena) {
             float adjustr = 2.f;
             std::unique_ptr<LabImage> bufmaskblurexp;
             std::unique_ptr<LabImage> originalmaskexp;