diff --git a/app/utils/zod.test.ts b/app/utils/zod.test.ts
index abd67e018..cd5cbe844 100644
--- a/app/utils/zod.test.ts
+++ b/app/utils/zod.test.ts
@@ -77,6 +77,18 @@ describe("actuallyNonEmptyStringOrNull", () => {
 	it("returns null for a string with only tag space emoji", () => {
 		expect(actuallyNonEmptyStringOrNull("󠀠󠀠󠀠󠀠󠀠")).toBeNull();
 	});
+
+	it("returns null for a string with only Hangul Filler", () => {
+		expect(actuallyNonEmptyStringOrNull("\u3164")).toBeNull();
+		expect(actuallyNonEmptyStringOrNull("ㅤㅤㅤ")).toBeNull();
+	});
+
+	it("returns null for other invisible characters", () => {
+		expect(actuallyNonEmptyStringOrNull("\u115F")).toBeNull();
+		expect(actuallyNonEmptyStringOrNull("\u1160")).toBeNull();
+		expect(actuallyNonEmptyStringOrNull("\uFEFF")).toBeNull();
+		expect(actuallyNonEmptyStringOrNull("\u2060")).toBeNull();
+	});
 });
 
 describe("timeString", () => {
diff --git a/app/utils/zod.ts b/app/utils/zod.ts
index 30b03ca56..5e1d4bfd6 100644
--- a/app/utils/zod.ts
+++ b/app/utils/zod.ts
@@ -164,7 +164,19 @@ export function safeJSONParse(value: unknown): unknown {
 	}
 }
 
-const EMPTY_CHARACTERS = ["\u200B", "\u200C", "\u200D", "\u200E", "\u200F", "󠀠"];
+const EMPTY_CHARACTERS = [
+	"\u200B",
+	"\u200C",
+	"\u200D",
+	"\u200E",
+	"\u200F",
+	"󠀠",
+	"\u3164",
+	"\u115F",
+	"\u1160",
+	"\uFEFF",
+	"\u2060",
+];
 const EMPTY_CHARACTERS_REGEX = new RegExp(EMPTY_CHARACTERS.join("|"), "g");
 
 const zalgoRe = /%CC%/g;