diff --git a/src/display/canvas.js b/src/display/canvas.js
index 811e625a72df61..247870f3b2d3cd 100644
--- a/src/display/canvas.js
+++ b/src/display/canvas.js
@@ -1006,6 +1006,7 @@ class CanvasGraphics {
       this.restore();
     }
 
+    this.current.activeSMask = null;
     this.ctx.restore();
 
     if (this.transparentCanvas) {
diff --git a/test/pdfs/issue18444.pdf.link b/test/pdfs/issue18444.pdf.link
new file mode 100644
index 00000000000000..f1e437217b2644
--- /dev/null
+++ b/test/pdfs/issue18444.pdf.link
@@ -0,0 +1 @@
+https://github.com/user-attachments/files/16264442/9.170.1.pdf
diff --git a/test/test_manifest.json b/test/test_manifest.json
index f970556c0b5126..c718e23dfca777 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -10160,5 +10160,15 @@
     "firstPage": 2,
     "lastPage": 2,
     "type": "eq"
+  },
+  {
+    "id": "issue18444",
+    "file": "pdfs/issue18444.pdf.pdf",
+    "md5": "233b7b72d67133044338a728d52d58a9",
+    "rounds": 1,
+    "link": true,
+    "firstPage": 1,
+    "lastPage": 1,
+    "type": "eq"
   }
 ]