Mixpanel Events Not Firing in Telegram WebView for Flutter App

·Jul 15, 2025 08:18 AM·

Hi Mixpanel community🙌 We’ve noticed that users who open our Flutter Web app inside Telegram (i.e. via the Telegram in-app browser/WebView) don’t generate any Mixpanel events. Everything works fine when opening the app in Safari or Chrome. Has anyone else encountered the same issue with Mixpanel silently failing inside Telegram WebView?

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1 comment

· Sorted by Oldest

Julianne Bozzini
APP
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Hi Pawel- Julianne from Mixpanel Support here. Diving right in, I don't see reports from other folks about events not tracking inside Telegram, but client-side tracking is affected by client settings. If you're reliably able to replicate the behavior when using the Telegram in-app browser, its likely the browser is blocking requests to Mixpanel in some way. If that's the case, I'd recommend implementing server-side tracking for key events. Server-side tracking isn't affected by ad-blockers or client settings and allows you more control over the data being sent. The Choosing the Right method doc has more information about various tracking options. Let me know if you have any questions!

Julianne Bozzini
APP
·
·
Hi Pawel- Julianne from Mixpanel Support here. Diving right in, I don't see reports from other folks about events not tracking inside Telegram, but client-side tracking is affected by client settings. If you're reliably able to replicate the behavior when using the Telegram in-app browser, its likely the browser is blocking requests to Mixpanel in some way. If that's the case, I'd recommend implementing server-side tracking for key events. Server-side tracking isn't affected by ad-blockers or client settings and allows you more control over the data being sent. The Choosing the Right method doc has more information about various tracking options. Let me know if you have any questions!