SPFx Teams App with more than 2 tabs on iOS Mobile won't load tabs 3+

[juliemturner]

Target SharePoint environment

SharePoint Online

What SharePoint development model, framework, SDK or API is this about?

💥 SharePoint Framework

Developer environment

Windows

What browser(s) / client(s) have you tested

• 💥 Internet Explorer
• 💥 Microsoft Edge
• 💥 Google Chrome
• 💥 FireFox
• 💥 Safari
• mobile (iOS/iPadOS)
• mobile (Android)
• not applicable
• other (enter in the "Additional environment details" area below)

Additional environment details

• iOS/iPadOS Version - 26.6.1
• SPFx version - 1.22.2

Describe the bug / error

I have a SPFx solution that has 4 web parts in it. I have created a teams manifest that creates a tab for each web part. In Teams Desktop on Windows and Mac, on Teams online client, and on Teams on Android mobile all four tabs load their SPFx web parts, however on iOS mobile and iPadOS only the first 2 tabs load. Tabs 3 and 4 give the following error message on the screen. Unfortunately, this makes the application unusable for the mobile workers.

Steps to reproduce

1. Build an SPFx solution with multiple web parts
2. Create a custom tab for each web part.
3. Deploy to teams and try and load on iPhone or iPad Teams.

Expected behavior

Tabs 3+ should load the SPFx solution.

[Ashlesha-MSFT]

Hello Julie Turner (@juliemturner)
Thank you for bringing this issue to our attention. We will look into it and get back to you shortly.

[Ashlesha-MSFT]

Julie Turner (@juliemturner)

Thanks for reporting this issue. I deployed the SPFx .sppkg tenant-wide to the SharePoint App Catalog. I then created a Teams manifest.json, packaged it with the two required icons into a separate .zip, and uploaded that ZIP to Teams. All four personal tabs loaded successfully.

If the issue persists, please share a minimal sample that reproduces the issue, including the SPFx solution and Teams manifest.json. Also confirm the Teams client version and iOS/iPadOS version used for testing. Please remove any tenant-specific URLs, credentials, or sensitive information before sharing.

[juliemturner]

Hello Ashlesha-MSFT I have created a solution that demonstrates the issue using an OOB 1.23.2 SPFx solution. You can find the repo here:

https://github.com/juliemturner/teams4tabissue

When deployed and then added to Teams which creates a personal app with 4 tabs, tabs 3 and 4 will not load on iOS mobile.

[Ashlesha-MSFT]

Hi Julie Turner (@juliemturner)
Thank you for sharing the sample. We were able to reproduce the issue on iOS: the first two personal tabs load successfully, while tabs 3 and 4 fail to open.

We will raise an internal bug with the relevant product team for further investigation and share updates here as they become available.