[Bug]: Second submenu does not open on Safari

### Code of conduct

- [x] I agree to follow this project's code of conduct.

### Impacted component(s)

sp-menu-item

### Library version

SWC 1.1.0

### Expected behavior

Submenus should open on hover

### Actual behavior

Second submenu does not open on hover

### Screenshots

https://github.com/user-attachments/assets/628b2b53-febd-42a8-ab5a-e0717e385882

### What browsers are you seeing the problem in?

Safari

### How can we reproduce this issue?

1. Go to https://opensource.adobe.com/spectrum-web-components/storybook/index.html?path=/story/menu-submenu--submenu&globals=system:spectrum-two
2. Hover over the submenus

### Sample code or abstract reproduction which illustrates the problem

_No response_

### Severity

None

### Logs taken while reproducing problem

_No response_

### Would you like to track this issue in Jira?

- [ ] Yes, please tell me the ticket number!