From f51c6c6b39655d4711a0f1ecf5881c64f6ad24da Mon Sep 17 00:00:00 2001
From: Michael Telatynski <7t3chguy@gmail.com>
Date: Wed, 12 Jul 2023 22:06:46 +0100
Subject: [PATCH 1/2] Fix read receipt sending behaviour around thread roots

---
 src/client.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/client.ts b/src/client.ts
index b8568a0a3c6..75e216ab28a 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -5000,7 +5000,8 @@ export class MatrixClient extends TypedEventEmitter<EmittedEvents, ClientEventHa
         });
 
         if (!unthreaded) {
-            const isThread = !!event.threadRootId;
+            // A thread cannot be just a thread root and a thread root can only be read in the main timeline
+            const isThread = !!event.threadRootId && !event.isThreadRoot;
             body = {
                 ...body,
                 thread_id: isThread ? event.threadRootId : MAIN_ROOM_TIMELINE,

From d92c69203b954e925ac04eea5f1d6b2c1ee82f9b Mon Sep 17 00:00:00 2001
From: Michael Telatynski <7t3chguy@gmail.com>
Date: Wed, 12 Jul 2023 23:57:10 +0100
Subject: [PATCH 2/2] Update src/client.ts

Co-authored-by: Eric Eastwood <erice@element.io>
---
 src/client.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/client.ts b/src/client.ts
index 75e216ab28a..a85b04f7dc2 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -5004,6 +5004,7 @@ export class MatrixClient extends TypedEventEmitter<EmittedEvents, ClientEventHa
             const isThread = !!event.threadRootId && !event.isThreadRoot;
             body = {
                 ...body,
+                // Only thread replies should define a specific thread. Thread roots can only be read in the main timeline.
                 thread_id: isThread ? event.threadRootId : MAIN_ROOM_TIMELINE,
             };
         }