[navigation menu] Nested inline submenus close unexpectedly on hover when entering a third-level submenu #4386
Description
Bug report
Current behavior
In a nested inline submenu implementation, when the root menu is opened via hover, opening a secondary submenu and then attempting to move the cursor into a third-level submenu causes the entire menu chain to close.
When the root menu is opened via click, third-level submenus behave as expected and remain open.
Expected behavior
In a nested inline submenu implementation, submenu behavior should be consistent regardless of how the root menu is opened.
Opening and interacting with deeper submenu levels (e.g., third-level submenus) should not cause ancestor menus to close, whether the root menu was triggered via hover or click.
Reproducible example
Hover Product -> Developers -> Composition
Base UI version
v1.3.0
Which browser are you using?
Chrome
Which OS are you using?
Mac OS
Additional context
I’ve included a minimal demo based on the current documentation example, making a few assumptions while combining elements from both submenu approaches.