[Bug]: OverflowMenu with enable-v12-overflowmenu no longer passes props through to IconButton

[jonathan-nagel]

Package

@carbon/react

Browser

No response

Package version

v1.113.0

React version

No response

Description

When the enable-v12-overflowmenu feature flag is enabled, OverflowMenu no longer forwards IconButton props to its trigger button.

Props that reach the trigger IconButton in the classic component but are ignored by the v12 version include for example: enterDelayMs, leaveDelayMs

It's unclear from the code whether that was intentional or an unintended side effect of the rewrite; I couldn't find an existing issue or migration note documenting it.

Reproduction/example

https://stackblitz.com/edit/github-jo88exyb?file=src%2FApp.jsx

Steps to reproduce

1. Enable the enable-v12-overflowmenu feature flag (via <FeatureFlags> or global config).
2. Render an OverflowMenu with enterDelayMs={1000} or leaveDelayMs={1000}.
3. Hover the trigger button and observe the tooltip appears/hides with the default ~100ms timing — the delay props have no effect.

Suggested Severity

Medium (Severity 3) = User can complete task, and/or has a workaround within the user experience of a given component.

Project name

IBM Knowledge Catalog

Code of Conduct

• I agree to follow this project's Code of Conduct
• I checked the current issues for duplicate problems

[carbon-automation]

Just a quick heads-up: for medium severity issues, it may be a while before the core team can get to this. If you’re up for opening a PR, that’ll likely be the quickest path to a fix, but no worries if not. Thanks!