diff --git a/src/shared/markdown-it/html.ts b/src/shared/markdown-it/html.ts
index 23cf69a1..57bf1193 100644
--- a/src/shared/markdown-it/html.ts
+++ b/src/shared/markdown-it/html.ts
@@ -202,7 +202,7 @@ function isParseableHtmlBlockToken(token: Token): parsedBlockTokenInfo {
     const content = token.content;
     // checks if a token matches `<open>content</close>` OR `<br />`
     const matches =
-        /^(?:(<[a-z0-9]+.*?>)([^<>]+?)(<\/[a-z0-9]+>))$|^(<[a-z0-9]+(?:\s.+?)?\s?\/?>)$/i.exec(
+        /^(?:(<[a-z0-9]+.*?>)([^<>\n]+?)(<\/[a-z0-9]+>))$|^(<[a-z0-9]+(?:\s.+?)?\s?\/?>)$/i.exec(
             content
         );
 
diff --git a/test/shared/markdown-it/html.test.ts b/test/shared/markdown-it/html.test.ts
index 8f440304..a11dd9e1 100644
--- a/test/shared/markdown-it/html.test.ts
+++ b/test/shared/markdown-it/html.test.ts
@@ -182,6 +182,13 @@ describe("html markdown-it plugin", () => {
             expect(tokens[1].children[1].type).toBe("html_inline");
             expect(tokens[1].children[1].content).toBe("</em>");
         });
+
+        it("should only transform inline html all on the same line", () => {
+            const markdown = `<sub>\ntest\n</sub>`;
+            const tokens = instance.parse(markdown, {});
+            expect(tokens).toHaveLength(1);
+            expect(tokens[0].type).toBe("html_block");
+        });
     });
 
     describe("html_block", () => {