diff --git a/js/layer_system_final.js b/js/layer_system_final.js
index 697a6d6..0711dec 100644
--- a/js/layer_system_final.js
+++ b/js/layer_system_final.js
@@ -144,7 +144,7 @@ app.registerExtension({
             this.rotationOffsetAngle = 0.0;
             
             this.toolbar = new Toolbar(this);
-			this.size[0] = 1000;
+			this.size[0] = 800;
             
             setTimeout(() => {
                 const anchorWidget = this.widgets.find(w => w.name === "_preview_anchor");
diff --git a/js/mask_manager.js b/js/mask_manager.js
index d2c72b4..e6d5e20 100644
--- a/js/mask_manager.js
+++ b/js/mask_manager.js
@@ -203,6 +203,9 @@ async handleEditMask() {
         maskUrl.searchParams.set("type", maskDetails.type);
         maskUrl.searchParams.set("subfolder", maskDetails.subfolder);
         
+		const lastUpdate = layerProps.mask_last_update || Date.now();
+        maskUrl.searchParams.set("t", lastUpdate);
+		
         const rawMaskImage = new Image();
         rawMaskImage.crossOrigin = "anonymous";
         rawMaskImage.src = maskUrl.href;
@@ -306,12 +309,13 @@ async handleEditMask() {
             rawCanvas.height = returned_image.naturalHeight;
             rawCanvas.getContext('2d').drawImage(returned_image, 0, 0);
             const blobToUpload = await new Promise(resolve => rawCanvas.toBlob(resolve, 'image/png'));
-            const file = new File([blobToUpload], `internal_mask_${activeLayer.index}_${+new Date()}.png`, { type: "image/png" });
+            const file = new File([blobToUpload], `internal_mask_${activeLayer.index}.png`, { type: "image/png" });
             const finalMaskResponse = await this._uploadFile(file, true);
             
             const layerProps = this.node.layer_properties[activeLayer.name];
             layerProps.internal_mask_filename = finalMaskResponse.name;
             layerProps.internal_mask_details = finalMaskResponse;
+			layerProps.mask_last_update = Date.now();
             this.node.updatePropertiesJSON();
             
             const standardizedCanvas = standardizeMaskFromEditor(returned_image);
@@ -461,6 +465,10 @@ createContextualToolbar() {
             url.searchParams.append("filename", details.name);
             url.searchParams.append("type", details.type);
             url.searchParams.append("subfolder", details.subfolder);
+			
+			const lastUpdate = layerProps.mask_last_update || Date.now();
+            url.searchParams.append("t", lastUpdate);
+			
             this.updatePreview(url.href);
         } else {
             this.updatePreview(null);
diff --git a/js/removebg.js b/js/removebg.js
index 3227279..ac323f2 100644
--- a/js/removebg.js
+++ b/js/removebg.js
@@ -8,7 +8,7 @@ export class RemoveBgManager {
 async performRemoveBg() {
     const activeLayer = this.maskManager.getActiveLayer();
     if (!activeLayer) return;
-
+    const layerIndex = activeLayer.index;
     const layerName = activeLayer.name;
     const previewInfo = this.node.preview_data?.[layerName];
     const sourceFilename = previewInfo?.filename;
@@ -27,7 +27,7 @@ async performRemoveBg() {
         const response = await fetch("/layersystem/remove_bg", {
             method: "POST",
             headers: { "Content-Type": "application/json" },
-            body: JSON.stringify({ filename: sourceFilename }),
+            body: JSON.stringify({ filename: sourceFilename, layer_index_str: String(layerIndex)}),
         });
 
         if (!response.ok) throw new Error(`Erreur du serveur : ${await response.text()}`);