From 774f2c8f061f916eb7c6c616c1121c64907546ae Mon Sep 17 00:00:00 2001
From: Mathias Jakobsen <mathias.jakobsen@overleaf.com>
Date: Fri, 31 Jul 2026 09:50:59 +0100
Subject: [PATCH] Merge pull request #36028 from overleaf/mj-fatal-op-long

[web] Stop arming FATAL_OP_TIMEOUT timer

GitOrigin-RevId: f0b98d6fb5d2312d3b5137ebba0775a88cb01b72
---
 .../frontend/js/features/ide-react/editor/share-js-doc.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/services/web/frontend/js/features/ide-react/editor/share-js-doc.ts b/services/web/frontend/js/features/ide-react/editor/share-js-doc.ts
index dd16c1a570..90d28cc76d 100644
--- a/services/web/frontend/js/features/ide-react/editor/share-js-doc.ts
+++ b/services/web/frontend/js/features/ide-react/editor/share-js-doc.ts
@@ -522,6 +522,14 @@ export class ShareJsDoc extends EventEmitter {
   }
 
   private startFatalTimeoutTimer(update: Update) {
+    if (
+      intermittentConnectionImprovementsEnabled &&
+      this.type === 'sharejs-text-ot'
+    ) {
+      // We're storing ops locally as a backup, so no need to panic if they
+      // don't reach the server this time.
+      return
+    }
     // If an op doesn't get acked within FATAL_OP_TIMEOUT, something has
     // gone unrecoverably wrong (the op will have been retried multiple times)
     if (this._timeoutTimer != null) {