[Tabs] Weird behavior in Safari & FF

[jpzwarte]

Provide a general summary of the issue here

Safari: https://github.com/user-attachments/assets/780a41d3-d3ea-4b4f-a6f1-a4499e6a9bf7
Firefox: https://github.com/user-attachments/assets/dabfaafd-959a-416f-9990-940181350fbd

I can't reproduce these behaviors in Chrome.

👤 Your name

Jeroen

🧢 Your Product/Team

SLDS