diff --git a/spec/unit/matrixrtc/MembershipManager.spec.ts b/spec/unit/matrixrtc/MembershipManager.spec.ts
index 18b2fb6309..71f12c5a41 100644
--- a/spec/unit/matrixrtc/MembershipManager.spec.ts
+++ b/spec/unit/matrixrtc/MembershipManager.spec.ts
@@ -602,6 +602,31 @@ describe("MembershipManager", () => {
             expect(connectEmit).toHaveBeenCalledWith(Status.Disconnecting, Status.Disconnected);
         });
     });
+    describe("local timeout error handling", () => {
+        it("retries sending restart delayed leave request after configure local timeout", async () => {
+            const manager = new MembershipManager(
+                { delayedEventRestartLocalTimeoutMs: 1000 },
+                room,
+                client,
+                () => undefined,
+            );
+            manager.join([focus], focusActive);
+            expect(client._unstable_sendDelayedStateEvent).toHaveBeenCalledTimes(1);
+            await jest.advanceTimersByTimeAsync(1);
+
+            expect(client._unstable_updateDelayedEvent).toHaveBeenCalledTimes(1);
+
+            // Simulate a local timeout error
+            // (client._unstable_updateDelayedEvent as Mock<any>).mockRejectedValue(new HTTPError("timeout", 408));
+            // Advance the timers so that the retry happens.
+            await jest.advanceTimersByTimeAsync(1100);
+            expect(client._unstable_updateDelayedEvent).toHaveBeenCalledWith("id", "restart", {
+                localTimeoutMs: 1000,
+                priority: "auto",
+            });
+        });
+    });
+
     describe("server error handling", () => {
         // Types of server error: 429 rate limit with no retry-after header, 429 with retry-after, 50x server error (maybe retry every second), connection/socket timeout
         describe("retries sending delayed leave event", () => {
diff --git a/src/matrixrtc/MatrixRTCSession.ts b/src/matrixrtc/MatrixRTCSession.ts
index 1951b676a9..58d413f12f 100644
--- a/src/matrixrtc/MatrixRTCSession.ts
+++ b/src/matrixrtc/MatrixRTCSession.ts
@@ -136,6 +136,15 @@ export interface MembershipConfig {
     /** @deprecated renamed to `networkErrorRetryMs`*/
     callMemberEventRetryDelayMinimum?: number;
 
+    /**
+     * The time (in milliseconds) after which a we consider a delayed event restart http request to have failed.
+     * Setting this to a lower value will result in more frequent retries but also a higher chance of failiour.
+     *
+     * the default local timeout in the js-sdk is 5 seconds.
+     * @default 5000
+     */
+    delayedEventRestartLocalTimeoutMs?: number;
+
     /**
      * If true, use the new to-device transport for sending encryption keys.
      */
diff --git a/src/matrixrtc/MembershipManager.ts b/src/matrixrtc/MembershipManager.ts
index 6839469c42..cca3ce7424 100644
--- a/src/matrixrtc/MembershipManager.ts
+++ b/src/matrixrtc/MembershipManager.ts
@@ -19,6 +19,7 @@ import { UpdateDelayedEventAction } from "../@types/requests.ts";
 import { type MatrixClient } from "../client.ts";
 import { UnsupportedDelayedEventsEndpointError } from "../errors.ts";
 import { ConnectionError, HTTPError, MatrixError } from "../http-api/errors.ts";
+import { type IRequestOpts } from "../http-api/index.ts";
 import { type Logger, logger as rootLogger } from "../logger.ts";
 import { type Room } from "../models/room.ts";
 import { type CallMembership, DEFAULT_EXPIRE_DURATION, type SessionMembershipData } from "./CallMembership.ts";
@@ -374,6 +375,9 @@ export class MembershipManager
         return this.joinConfig?.maximumNetworkErrorRetryCount ?? 10;
     }
 
+    private get delayedEventRestartLocalTimeoutMs(): number | undefined {
+        return this.joinConfig?.delayedEventRestartLocalTimeoutMs;
+    }
     // LOOP HANDLER:
     private async membershipLoopHandler(type: MembershipActionType): Promise<ActionUpdate> {
         switch (type) {
@@ -525,8 +529,11 @@ export class MembershipManager
     }
 
     private async restartDelayedEvent(delayId: string): Promise<ActionUpdate> {
+        const requestOptions: IRequestOpts = {
+            localTimeoutMs: this.delayedEventRestartLocalTimeoutMs,
+        };
         return await this.client
-            ._unstable_updateDelayedEvent(delayId, UpdateDelayedEventAction.Restart)
+            ._unstable_updateDelayedEvent(delayId, UpdateDelayedEventAction.Restart, requestOptions)
             .then(() => {
                 this.resetRateLimitCounter(MembershipActionType.RestartDelayedEvent);
                 return createInsertActionUpdate(