# Stagehand fixes cross-origin iframes lost after act() calls

published: 2026-11-04T06:05:28.472Z
topic: browsers
source: https://github.com/browserbase/stagehand/releases/tag/stagehand-python%404.4.0a0.dev1675
url: https://aiagentnews.io/stories/stagehand-fixes-cross-origin-iframes-lost-after-act-calls

Stagehand's Python package release 4.4.0a0.dev1675 fixes a bug where calling act() could stop the library from seeing and interacting with newly loaded cross-origin iframes. The cause was a network-settling helper that overwrote the browser's auto-attach configuration.

According to the release notes, the network-settling helper in actHandlerUtils.ts overwrote the browser's auto-attach configuration after act() ran. That could leave newly loaded cross-origin iframes invisible to Stagehand and unusable for later actions.

The fix removes the conflicting Target.setAutoAttach call and leaves attachment management to BrowserContext. A regression test checks that cross-origin iframes created after act() stay visible in snapshots and still support subsequent actions.

The change is a development build tagged in the browserbase/stagehand repository, and it is listed as pull request #3388.

## Why it matters if you build agents

If your agent uses act() on pages that load cross-origin iframes, such as embedded payment or login forms, this build restores their visibility to later steps.

Agents that worked around the missing iframes by re-navigating or skipping those elements can check whether that workaround is still needed.

Because this is a prerelease tag, pin it deliberately and test it before relying on it in production.