# Problem when screen share is interrupted by another user

**URL:** <https://devforum.zoom.us/t/problem-when-screen-share-is-interrupted-by-another-user/133073>\
**Category:** iOS\
**Tags:** video-sdk, ios\
**Created:** [May 22, 2025, 8:32am UTC](https://devforum.zoom.us/t/problem-when-screen-share-is-interrupted-by-another-user/133073 "2025-05-22T08:32:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![giovanna.rodrigues](https://avatars.discourse-cdn.com/v4/letter/g/4bbf92/32.png) [@giovanna.rodrigues](https://devforum.zoom.us/u/giovanna.rodrigues)\
**Post date:** [May 22, 2025, 8:32am UTC](https://devforum.zoom.us/t/problem-when-screen-share-is-interrupted-by-another-user/133073/1 "2025-05-22T08:32:57Z")

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**Description**  
I implemented screen sharing by following the documentation and using `RPSystemBroadcastPickerView` to display the broadcast picker to start and stop the screen share, and I’m using `onUserShareStatusChanged` to render it, in our case, we only want to render one screen at a time.

I have two issues during a call where one user is using an iOS device and the other user uses Web client.

1. While the iOS user is presenting the screen and the Web user starts sharing their screen, I receive an error “Attempted to start an invalid broadcast session”.
2. While the Web user is presenting the screen and the iOS user starts sharing their screen, if I tap “Stop Broadcast” in the picker view, the image freezes on both clients, `broadcastFinished` is called in `SampleHandler` but `onUserShareStatusChanged` is not.

**Which iOS Video SDK version?**  
2.1.5

**Troubleshooting Routes**

- Checked App Group ID is correct
- Checked `ZoomVideoSDK.shareInstance()?.getShareHelper()` is called
- Checked `SampleHandler` functions are called correctly
- Checked `CptShare` was added with “Embed & Sign” option.

**Smartphone (please complete the following information):**

- Device: iPhone 13 Pro
- OS: iOS 18.4.1

**Additional context**  
The screen share functionality works as expected if I’m sharing iOS or Web client without another using presenting the screen on top of a current presentation.

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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 22, 2026, 8:33am UTC](https://devforum.zoom.us/t/problem-when-screen-share-is-interrupted-by-another-user/133073/2 "2026-05-22T08:33:10Z")

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