Bug? Teams thread permalink does not show the full thread history (Desktop + Web)

Hi everyone,

I believe I've found a bug in the new Teams threaded channel experience and I'm trying to determine whether others can reproduce it.

Scenario

I have a long-running thread in a Teams channel.

If I open the thread directly from the channel by clicking the reply count (e.g."340 replies"), I can see the complete conversation, including the most recent replies.

However, if I:

1. Open the thread
2. Use Copy link
3. Open the generated link

Teams opens the thread, but only displays part of the conversation. Newer replies are missing even though they exist and are visible when opening the same thread directly from the channel.

Note:

I cannot share the permalink publicly because it points to content within my organisation. However, the link was generated by Teams itself using the thread's Copy link action. The issue is reproducible with any user who has access to the thread.

What I've tested

• Teams Desktop 
• Teams Web 
• Same behaviour in both clients 
• Opening via the channel reply count shows all recent replies 
• Opening via the permalink shows only a partial thread

Expected behaviour

A thread permalink generated by Teams should open the same live thread view as clicking the reply count from within the channel. The full conversation history should be available and the latest replies should be visible.

Ideally:

• The full thread history should be available.
• The latest replies should be visible.
• The link should open the current state of the thread, not an apparently truncated version.

Actual behaviour

The permalink opens the correct thread but appears to stop at an older point in the conversation, while newer replies remain accessible only when opening the thread from the channel itself.

Has anybody else seen this behaviour with threaded channels?

Screenshot 1 and 2: Correct behaviour

• Open thread via "340 replies"
• Show:
  • Thread title
  • Reply count (e.g. 340 replies)
  • One or two recent messages (July 2026)

Screenshot 3: Incorrect behaviour

• Open the same thread via the permalink
• Show:
  • Same thread title
  • Same thread
  • Conversation stopping much earlier
  • Missing recent replies