diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6eda3003ef..da084600b7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@
 * Fix reactivity when passing `$$props` to a `<slot>` ([#3364](https://github.com/sveltejs/svelte/issues/3364))
 * Fix unneeded invalidation of `$$props` and `$$restProps` ([#4993](https://github.com/sveltejs/svelte/issues/4993), [#5118](https://github.com/sveltejs/svelte/issues/5118))
 * Provide better compiler error message when mismatched tags are due to autoclosing of tags ([#5049](https://github.com/sveltejs/svelte/issues/5049))
+* Fix `bind:group` when using contextual reference ([#5174](https://github.com/sveltejs/svelte/issues/5174))
 
 ## 3.24.0
 
diff --git a/src/compiler/compile/nodes/Binding.ts b/src/compiler/compile/nodes/Binding.ts
index bcb07280b0..c561e72b99 100644
--- a/src/compiler/compile/nodes/Binding.ts
+++ b/src/compiler/compile/nodes/Binding.ts
@@ -41,7 +41,8 @@ export default class Binding extends Node {
 		this.raw_expression = JSON.parse(JSON.stringify(info.expression));
 
 		const { name } = get_object(this.expression.node);
-		this.is_contextual = scope.names.has(name);
+
+		this.is_contextual = Array.from(this.expression.references).some(name => scope.names.has(name));
 
 		// make sure we track this as a mutable ref
 		if (scope.is_let(name)) {
@@ -49,7 +50,7 @@ export default class Binding extends Node {
 				code: 'invalid-binding',
 				message: 'Cannot bind to a variable declared with the let: directive'
 			});
-		} else if (this.is_contextual) {
+		} else if (scope.names.has(name)) {
 			if (scope.is_await(name)) {
 				component.error(this, {
 					code: 'invalid-binding',
diff --git a/src/compiler/compile/nodes/shared/Expression.ts b/src/compiler/compile/nodes/shared/Expression.ts
index 8bfc2bffce..bbbc1b2f2d 100644
--- a/src/compiler/compile/nodes/shared/Expression.ts
+++ b/src/compiler/compile/nodes/shared/Expression.ts
@@ -24,7 +24,7 @@ export default class Expression {
 	component: Component;
 	owner: Owner;
 	node: any;
-	references: Set<string>;
+	references: Set<string> = new Set();
 	dependencies: Set<string> = new Set();
 	contextual_dependencies: Set<string> = new Set();
 
@@ -50,7 +50,7 @@ export default class Expression {
 		this.template_scope = template_scope;
 		this.owner = owner;
 
-		const { dependencies, contextual_dependencies } = this;
+		const { dependencies, contextual_dependencies, references } = this;
 
 		let { map, scope } = create_scopes(info);
 		this.scope = scope;
@@ -75,6 +75,7 @@ export default class Expression {
 
 				if (is_reference(node, parent)) {
 					const { name, nodes } = flatten_reference(node);
+					references.add(name);
 
 					if (scope.has(name)) return;
 
diff --git a/src/compiler/compile/render_dom/wrappers/shared/mark_each_block_bindings.ts b/src/compiler/compile/render_dom/wrappers/shared/mark_each_block_bindings.ts
index 490d52bd9d..884d4b88b8 100644
--- a/src/compiler/compile/render_dom/wrappers/shared/mark_each_block_bindings.ts
+++ b/src/compiler/compile/render_dom/wrappers/shared/mark_each_block_bindings.ts
@@ -2,7 +2,6 @@ import EachBlock from "../../../nodes/EachBlock";
 import InlineComponentWrapper from "../InlineComponent";
 import ElementWrapper from "../Element";
 import Binding from "../../../nodes/Binding";
-import get_object from "../../../utils/get_object";
 
 export default function mark_each_block_bindings(
 	parent: ElementWrapper | InlineComponentWrapper,
@@ -10,9 +9,12 @@ export default function mark_each_block_bindings(
 ) {
 	// we need to ensure that the each block creates a context including
 	// the list and the index, if they're not otherwise referenced
-	const object = get_object(binding.expression.node).name;
-	const each_block = parent.node.scope.get_owner(object);
-	(each_block as EachBlock).has_binding = true;
+	binding.expression.references.forEach(name => {
+		const each_block = parent.node.scope.get_owner(name);
+		if (each_block) {
+			(each_block as EachBlock).has_binding = true;
+		}
+	});
 
 	if (binding.name === "group") {
 		// for `<input bind:group={} >`, we make sure that all the each blocks creates context with `index`
diff --git a/test/runtime/samples/binding-input-group-each-6/_config.js b/test/runtime/samples/binding-input-group-each-6/_config.js
new file mode 100644
index 0000000000..9eb251bf5d
--- /dev/null
+++ b/test/runtime/samples/binding-input-group-each-6/_config.js
@@ -0,0 +1,87 @@
+export default {
+	html: `
+		<label><input type="checkbox" value="x"> x</label>
+		<label><input type="checkbox" value="y"> y</label>
+		<label><input type="checkbox" value="z"> z</label>
+		<p></p>
+		<label><input type="checkbox" value="x"> x</label>
+		<label><input type="checkbox" value="y"> y</label>
+		<label><input type="checkbox" value="z"> z</label>
+		<p></p>
+		<label><input type="checkbox" value="x"> x</label>
+		<label><input type="checkbox" value="y"> y</label>
+		<label><input type="checkbox" value="z"> z</label>
+		<p></p>
+	`,
+
+	async test({ assert, component, target, window }) {
+		const inputs = target.querySelectorAll('input');
+		assert.equal(inputs[0].checked, false);
+		assert.equal(inputs[1].checked, false);
+		assert.equal(inputs[2].checked, false);
+
+		assert.equal(inputs[3].checked, false);
+		assert.equal(inputs[4].checked, false);
+		assert.equal(inputs[5].checked, false);
+
+		assert.equal(inputs[6].checked, false);
+		assert.equal(inputs[7].checked, false);
+		assert.equal(inputs[8].checked, false);
+
+		const event = new window.Event('change');
+
+		inputs[2].checked = true;
+		await inputs[2].dispatchEvent(event);
+
+		assert.htmlEqual(target.innerHTML, `
+			<label><input type="checkbox" value="x"> x</label>
+			<label><input type="checkbox" value="y"> y</label>
+			<label><input type="checkbox" value="z"> z</label>
+			<p>z</p>
+			<label><input type="checkbox" value="x"> x</label>
+			<label><input type="checkbox" value="y"> y</label>
+			<label><input type="checkbox" value="z"> z</label>
+			<p></p>
+			<label><input type="checkbox" value="x"> x</label>
+			<label><input type="checkbox" value="y"> y</label>
+			<label><input type="checkbox" value="z"> z</label>
+			<p></p>
+		`);
+
+		inputs[4].checked = true;
+		await inputs[4].dispatchEvent(event);
+
+		assert.htmlEqual(target.innerHTML, `
+			<label><input type="checkbox" value="x"> x</label>
+			<label><input type="checkbox" value="y"> y</label>
+			<label><input type="checkbox" value="z"> z</label>
+			<p>z</p>
+			<label><input type="checkbox" value="x"> x</label>
+			<label><input type="checkbox" value="y"> y</label>
+			<label><input type="checkbox" value="z"> z</label>
+			<p>y</p>
+			<label><input type="checkbox" value="x"> x</label>
+			<label><input type="checkbox" value="y"> y</label>
+			<label><input type="checkbox" value="z"> z</label>
+			<p></p>
+		`);
+
+		inputs[5].checked = true;
+		await inputs[5].dispatchEvent(event);
+
+		assert.htmlEqual(target.innerHTML, `
+			<label><input type="checkbox" value="x"> x</label>
+			<label><input type="checkbox" value="y"> y</label>
+			<label><input type="checkbox" value="z"> z</label>
+			<p>z</p>
+			<label><input type="checkbox" value="x"> x</label>
+			<label><input type="checkbox" value="y"> y</label>
+			<label><input type="checkbox" value="z"> z</label>
+			<p>y, z</p>
+			<label><input type="checkbox" value="x"> x</label>
+			<label><input type="checkbox" value="y"> y</label>
+			<label><input type="checkbox" value="z"> z</label>
+			<p></p>
+		`);
+	}
+};
diff --git a/test/runtime/samples/binding-input-group-each-6/main.svelte b/test/runtime/samples/binding-input-group-each-6/main.svelte
new file mode 100644
index 0000000000..85be939e8a
--- /dev/null
+++ b/test/runtime/samples/binding-input-group-each-6/main.svelte
@@ -0,0 +1,22 @@
+<script>
+	const values = ['x', 'y', 'z'];
+	const list = {
+		a: [],
+		b: [],
+		c: [],
+	};
+</script>
+
+{#each Object.keys(list) as key}
+	{#each values as value}
+		<label>
+			<input 
+				type='checkbox'
+				bind:group={list[key]}
+				value={value}
+			/>
+			{value}
+		</label>
+	{/each}
+	<p>{list[key].join(', ')}</p>
+{/each}