diff --git a/.changeset/metal-shirts-invite.md b/.changeset/metal-shirts-invite.md
new file mode 100644
index 00000000..01f92902
--- /dev/null
+++ b/.changeset/metal-shirts-invite.md
@@ -0,0 +1,5 @@
+---
+'typedoc-plugin-markdown': patch
+---
+
+- Fix missing index descriptions for some signatures (#670)
diff --git a/packages/typedoc-plugin-markdown/src/theme/context/helpers/_index.ts b/packages/typedoc-plugin-markdown/src/theme/context/helpers/_index.ts
index dc28d042..93a2aad7 100644
--- a/packages/typedoc-plugin-markdown/src/theme/context/helpers/_index.ts
+++ b/packages/typedoc-plugin-markdown/src/theme/context/helpers/_index.ts
@@ -1,5 +1,4 @@
 export * from './get-angle-bracket';
-export * from './get-comment-for-reflection';
 export * from './get-comment-parts';
 export * from './get-declaration-type';
 export * from './get-description-for-comment';
diff --git a/packages/typedoc-plugin-markdown/src/theme/context/helpers/get-comment-for-reflection.ts b/packages/typedoc-plugin-markdown/src/theme/context/helpers/get-comment-for-reflection.ts
deleted file mode 100644
index 645a3e2d..00000000
--- a/packages/typedoc-plugin-markdown/src/theme/context/helpers/get-comment-for-reflection.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-import { DeclarationReflection } from 'typedoc';
-
-export function getCommentForReflection(model: DeclarationReflection) {
-  return model.signatures?.length
-    ? model.signatures[0].comment || model.comment
-    : model.comment;
-}
diff --git a/packages/typedoc-plugin-markdown/src/theme/context/helpers/get-group-index-table.ts b/packages/typedoc-plugin-markdown/src/theme/context/helpers/get-group-index-table.ts
index 7bb99bc1..6ba36be5 100644
--- a/packages/typedoc-plugin-markdown/src/theme/context/helpers/get-group-index-table.ts
+++ b/packages/typedoc-plugin-markdown/src/theme/context/helpers/get-group-index-table.ts
@@ -37,7 +37,7 @@ export function getGroupIndexTable(
         return child.frontmatter.description as string;
       }
 
-      const comment = this.helpers.getCommentForReflection(child);
+      const comment = child.comment || child.signatures?.[0]?.comment;
 
       if (!comment) {
         return '';
diff --git a/packages/typedoc-plugin-markdown/src/theme/context/resources.ts b/packages/typedoc-plugin-markdown/src/theme/context/resources.ts
index 7ca09eec..7b0daacf 100644
--- a/packages/typedoc-plugin-markdown/src/theme/context/resources.ts
+++ b/packages/typedoc-plugin-markdown/src/theme/context/resources.ts
@@ -268,10 +268,6 @@ export const resourceHelpers = (context: MarkdownThemeContext) => {
   return {
     getAngleBracket: (bracket: '<' | '>') =>
       helpers.getAngleBracket.apply(context, [bracket]) as string,
-    getCommentForReflection: (model: DeclarationReflection) =>
-      helpers.getCommentForReflection.apply(context, [model]) as
-        | Comment
-        | undefined,
     getCommentParts: (model: CommentDisplayPart[]) =>
       helpers.getCommentParts.apply(context, [model]) as string,
     getDeclarationType: (model: DeclarationReflection) =>
diff --git a/packages/typedoc-plugin-markdown/test/fixtures/src/reflections/functions.ts b/packages/typedoc-plugin-markdown/test/fixtures/src/reflections/functions.ts
index c7232753..07abd50e 100644
--- a/packages/typedoc-plugin-markdown/test/fixtures/src/reflections/functions.ts
+++ b/packages/typedoc-plugin-markdown/test/fixtures/src/reflections/functions.ts
@@ -13,6 +13,15 @@ export const basicFunction = (someParam: number) => {
   return 0;
 };
 
+/**
+ * This is a function that is assigned to a variable.
+ *
+ * @returns This is a return value
+ */
+export const basicFunctionWithReturns = () => {
+  return 0;
+};
+
 /**
  * This is a function with a parameter that has a default value.
  *
diff --git a/packages/typedoc-plugin-markdown/test/specs/__snapshots__/navigation.spec.ts.snap b/packages/typedoc-plugin-markdown/test/specs/__snapshots__/navigation.spec.ts.snap
index 528ddd8a..0aed462d 100644
--- a/packages/typedoc-plugin-markdown/test/specs/__snapshots__/navigation.spec.ts.snap
+++ b/packages/typedoc-plugin-markdown/test/specs/__snapshots__/navigation.spec.ts.snap
@@ -4408,6 +4408,11 @@ exports[`Navigation should gets Navigation Json for single entry point: (Output
         "kind": 64,
         "path": "functions/basicFunction.md"
       },
+      {
+        "title": "basicFunctionWithReturns",
+        "kind": 64,
+        "path": "functions/basicFunctionWithReturns.md"
+      },
       {
         "title": "functionReturningAFunction",
         "kind": 64,
diff --git a/packages/typedoc-plugin-markdown/test/specs/__snapshots__/reflection.index.spec.ts.snap b/packages/typedoc-plugin-markdown/test/specs/__snapshots__/reflection.index.spec.ts.snap
index 1f093416..ce919a6a 100644
--- a/packages/typedoc-plugin-markdown/test/specs/__snapshots__/reflection.index.spec.ts.snap
+++ b/packages/typedoc-plugin-markdown/test/specs/__snapshots__/reflection.index.spec.ts.snap
@@ -108,6 +108,7 @@ Module commments
 | Function | Description |
 | :------ | :------ |
 | [basicFunction](functions/basicFunction.md) | This is a function that is assigned to a variable. |
+| [basicFunctionWithReturns](functions/basicFunctionWithReturns.md) | This is a function that is assigned to a variable. |
 | [functionReturningAFunction](functions/functionReturningAFunction.md) | Comments for function |
 | [functionReturningAPromise](functions/functionReturningAPromise.md) | Comments for function |
 | [functionReturningAString](functions/functionReturningAString.md) | Comments for function |
@@ -115,7 +116,7 @@ Module commments
 | [functionReturningAnObject](functions/functionReturningAnObject.md) | Comments for function |
 | [functionWithComplexParams](functions/functionWithComplexParams.md) | Function with function parmas |
 | [functionWithDefaultParameters](functions/functionWithDefaultParameters.md) | This is a function with a parameter that has a default value. |
-| [functionWithMultipleSignatures](functions/functionWithMultipleSignatures.md) | This is the first signature of a function with multiple signatures. |
+| [functionWithMultipleSignatures](functions/functionWithMultipleSignatures.md) | Main function comment. |
 | [functionWithNamedParams](functions/functionWithNamedParams.md) | - |
 | [functionWithNestedParameters](functions/functionWithNestedParameters.md) | Some nested params. |
 | [functionWithOptionalParameters](functions/functionWithOptionalParameters.md) | This is a function with a parameters. |
diff --git a/packages/typedoc-plugin-markdown/test/specs/__snapshots__/urls.spec.ts.snap b/packages/typedoc-plugin-markdown/test/specs/__snapshots__/urls.spec.ts.snap
index e3ffee0e..ab60b8d8 100644
--- a/packages/typedoc-plugin-markdown/test/specs/__snapshots__/urls.spec.ts.snap
+++ b/packages/typedoc-plugin-markdown/test/specs/__snapshots__/urls.spec.ts.snap
@@ -800,6 +800,7 @@ exports[`Urls should gets Urls for single entry points: outputFileStrategy: memb
   "enumerations/BasicEnum.md",
   "enumerations/EnumWithValues.md",
   "functions/basicFunction.md",
+  "functions/basicFunctionWithReturns.md",
   "functions/functionReturningAFunction.md",
   "functions/functionReturningAPromise.md",
   "functions/functionReturningAString.md",
@@ -881,6 +882,7 @@ exports[`Urls should gets Urls for single entry points: outputFileStrategy: memb
   "enumerations/BasicEnum.md",
   "enumerations/EnumWithValues.md",
   "functions/basicFunction.md",
+  "functions/basicFunctionWithReturns.md",
   "functions/functionReturningAFunction.md",
   "functions/functionReturningAPromise.md",
   "functions/functionReturningAString.md",