New island tab button is not dissapearing at 123.0.5669.23
Open few tabs within an island.
326e8220-a100-4d06-8d47-ab2eb3029f2b-Screenshot 2025-11-03 113217.png
The mouse is staying over the highlighted tab (very important!).
The new island tab button is visible, which is correct.
Close the current tab. Then the focus moves to the last tab from the island.
16284761-7a06-41e4-bb83-4fb9815c72c2-Screenshot 2025-11-03 113302.png
The focus remain on the current tab, highlighted in the picture. The new island tab button is visible, which is correct.
Now close the last tab from the current island:
6ba3e3a4-686d-4e27-8dfc-489b38279996-Screenshot 2025-11-03 113346.png
The focus moves on another tab, from another tab island, or anywhere (highlighted in the picture).
Here you can see the bug: the new island tab button is still visible, and remains as visible anywhere you move the mouse:
1ca55f26-fcbc-4c97-ab31-de6effe80344-Screenshot 2025-11-03 115715.png
I worked in browser, but the new island tab button is still visible, which is incorrect.
The bug is very easy to reproduce (I guess I have been clear enough, if not, tell me).