Cannot select item within optgroup

[Regenhardt]

It seems this exact problem has been fixed long ago: #367

Except for some reason, I still can't select an item from a dropdown with the item being within an optgroup.
The dropdown is being generated at runtime using angularjs and looks like this:

<select id="dropdown">
  <option label="Please choose">Please choose</option>
  <optgroup label="User">
    <option label="Test1">
      Test1
    </option>
    <option label="Test2">
      Test2
    </option>
  </optgroup>
</select>

Calling cy.get('#dropdown').select('Test1') will for some reason time out as it doesn't find the option in the optgroup.

Any idea what I'm doing wrong? This does seem pretty trivial to me.

[Regenhardt]

This happens with both our current Cypress version 4.12.1 and an updated version 6.3.0 to test it.