diff --git a/src/htmlminifier.js b/src/htmlminifier.js
index 6c2d6dd..cb54ebb 100644
--- a/src/htmlminifier.js
+++ b/src/htmlminifier.js
@@ -905,8 +905,8 @@ async function minifyHTML(value, options, partialMarkup) {
 
               const ids = [];
               new CleanCSS().minify(wrapCSS(text, type)).warnings.forEach(function (warning) {
-                const match = uidPattern.exec(warning);
-                if (match) {
+                let match;
+                while ((match = uidPattern.exec(warning))) {
                   const id = uidAttr + match[2] + uidAttr;
                   text = text.replace(id, ignoreCSS(id));
                   ids.push(id);
diff --git a/tests/minifier.spec.js b/tests/minifier.spec.js
index 67b61a6..2fa6463 100644
--- a/tests/minifier.spec.js
+++ b/tests/minifier.spec.js
@@ -3594,3 +3594,14 @@ test('minify Content-Security-Policy', async () => {
   input = '<meta http-equiv="content-security-policy" content="default-src \'self\'; img-src https://*;">';
   expect(await minify(input)).toBe(input);
 });
+
+test('minify CSS multiple ignore in single warning', async () => {
+  const input = '<style type="text/css">\n{% ignore1 %}\na {\n{% ignore2 %}\n}\n{% ignore3 %}\n</style>';
+  const output = '<style type="text/css">\n{% ignore1 %}\na{\n{% ignore2 %}\n}\n{% ignore3 %}\n</style>';
+  expect(await minify(input, {
+    ignoreCustomFragments: [/\{%[\s\S]*?%\}/],
+    minifyCSS: {
+      level: 0
+    }
+  })).toBe(output);
+});