diff --git a/src/js/static-net-filtering.js b/src/js/static-net-filtering.js
index 34eace3eb..855635b17 100644
--- a/src/js/static-net-filtering.js
+++ b/src/js/static-net-filtering.js
@@ -194,6 +194,7 @@ const isHnAnchored = (( ) => {
             } else {
                 lastEnd = -1;
             }
+            lastLen = len;
         }
         return matchStart < lastEnd && (
             matchStart === lastBeg ||
diff --git a/src/js/utils.js b/src/js/utils.js
index ed493033a..ca312bd07 100644
--- a/src/js/utils.js
+++ b/src/js/utils.js
@@ -585,7 +585,7 @@
         }
         const inputLength = instr.length;
         const outbuf = arrbuf instanceof ArrayBuffer === false
-            ? new Uint32Array(this.decodeSize(instr))
+            ? new Uint32Array(this.decodeSize(instr) >> 2)
             : new Uint32Array(arrbuf);
         let i = instr.indexOf(' ', this.magic.length) + 1;
         if ( i === -1 ) {