SDK bug causing elevated capturing of exceptions

Incident Report for PostHog

Resolved

This incident has been resolved.

Posted Oct 06, 2025 - 16:14 UTC

Update

We have confirmed that the fix has resolved the issue in the latest version of the SDK.

Exceptions caught as a result of the bug in our SDK will not contribute towards your usage.

Posted Oct 03, 2025 - 22:27 UTC

Monitoring

A fix has been released and we are now monitoring the situation.

If required, the latest posthog-js version can be found at https://github.com/PostHog/posthog-js/releases/tag/posthog-js%401.270.1 or https://www.npmjs.com/package/posthog-js/v/1.270.1

Posted Oct 03, 2025 - 17:04 UTC

Identified

We've identified a bug in a recently shipped version of our javascript web SDK, around our surveys product. This seems to have had minimal impact on user site functionality, but is resulting in hugely inflated rates of exception capture for teams using our error tracking product. We're currently working to release a fix, and identifying impacted users to refund any exceptions captured as a result of this error.

If you see elevated rates of exceptions captured with:
Type: TypeError
Message: e.persistence.isDisabled is not a function

and are billed for these exceptions, please contact support, with product are "Error Tracking".

Posted Oct 03, 2025 - 16:33 UTC