# Duplicate participants on reconnection

**URL:** <https://devforum.zoom.us/t/duplicate-participants-on-reconnection/68045>\
**Category:** Web\
**Created:** [April 25, 2022, 8:17am UTC](https://devforum.zoom.us/t/duplicate-participants-on-reconnection/68045 "2022-04-25T08:17:55Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![shoaib](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/shoaib/32/28580_2.png) [@shoaib](https://devforum.zoom.us/u/shoaib)\
**Post date:** [April 25, 2022, 8:17am UTC](https://devforum.zoom.us/t/duplicate-participants-on-reconnection/68045/1 "2022-04-25T08:17:56Z")

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Hey @vic.yang, @tommy

Seems like there one possible bug in SDK failover flow,

> [@How to handle internet disconnection properly](https://devforum.zoom.us/t/how-to-handle-internet-disconnection-properly/65018/17):
>
> Thanks for the clarification @vic.yang !

**Issue:**  
When user disconnects the call manually when there is no network connection, and rejoins when network comes back, then sometimes there is a duplicate participant in the Zoom session as Zoom SDK was not able to remove previously disconnected user from the session.

Sharing few session ID where the issue was observed:  
`r57mlsxlRCK1ma3e3DjVrA== `, `X9VjSspjSxuBbcGkcyWHbg== `

**Which Web Video SDK version?**  
1.2.3

**Device**

- Device: Macbook Pro, Windows 10 Pro
- Browser: Chrome (100.0.4896.127 (Official Build) (x86\_64)  
)

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**Author:** ![vic.yang](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/vic.yang/32/24656_2.png) [@vic.yang](https://devforum.zoom.us/u/vic.yang)\
**Post date:** [April 25, 2022, 9:20am UTC](https://devforum.zoom.us/t/duplicate-participants-on-reconnection/68045/2 "2022-04-25T09:20:35Z")

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Hey @shoaib

Thanks for your feedback.

It’s similar to the scenario I mentioned in this thread [How to handle internet disconnection properly - #14 by vic.yang](https://devforum.zoom.us/t/how-to-handle-internet-disconnection-properly/65018/14). The manually rejoined user is treated as a new participant, and the duplicate participant will disappear within 2 minutes.

Thanks  
Vic

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**Author:** ![shoaib](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/shoaib/32/28580_2.png) [@shoaib](https://devforum.zoom.us/u/shoaib)\
**Post date:** [April 25, 2022, 9:42am UTC](https://devforum.zoom.us/t/duplicate-participants-on-reconnection/68045/3 "2022-04-25T09:42:21Z")

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Hey @vic.yang,

Thanks for the fast reply.

Yes, but I also think that ideally It should not happen right? because users don’t know that duplicate participant will disappear within 2 minutes. (The issue was reported by few of our users only)

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**Author:** ![wendllandsontyrell94](https://avatars.discourse-cdn.com/v4/letter/w/9f8e36/32.png) [@wendllandsontyrell94](https://devforum.zoom.us/u/wendllandsontyrell94)\
**Post date:** [April 27, 2022, 5:39pm UTC](https://devforum.zoom.us/t/duplicate-participants-on-reconnection/68045/4 "2022-04-27T17:39:34Z")

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> [@vic.yang](#):
>
> Hey @shoaib
> 
> Thanks for your feedback.
> 
> It’s similar to the scenario I mentioned in this thread [https://devforum.zoom.us/t/how-to-handle-internet-disconnection-properly/65018/14-](https://devforum.zoom.us/t/how-to-handle-internet-disconnection-properly/65018/14-)[tech website](https://besttechi.com/). The manually rejoined user is treated as a new participant, and the duplicate participant will disappear within 2 minutes.
> 
> Thanks  
> Vic

Thanks for sharing the solution. I was about to ask the same question but found this related thread. You reply helped me alot.

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**Author:** ![shoaib](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/shoaib/32/28580_2.png) [@shoaib](https://devforum.zoom.us/u/shoaib)\
**Post date:** [April 29, 2022, 10:52am UTC](https://devforum.zoom.us/t/duplicate-participants-on-reconnection/68045/5 "2022-04-29T10:52:06Z")

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Also, we are noticing in some cases that after that duplicate user gets disappear (after 2 mins) remote participant’s video gets blanked (for the user who got reconnected) and only comes back when remote user toggle’s video.  
Some of the affected sessions from the above issue: `q14QZ7ngRJKhvkFQNHXetQ==`, `W+fvXXX+Tbmf0JfirJ6NOg== `

Also, there were no errors in the console.

@tommy @vic.yang Not sure about the reason of the issue but It seems like SDK’s reconnection flow still have some issues.

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**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\
**Post date:** [May 29, 2022, 8:52pm UTC](https://devforum.zoom.us/t/duplicate-participants-on-reconnection/68045/6 "2022-05-29T20:52:07Z")

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Closed on May 29, 2022, 8:52pm UTC

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