Dropdown does not open when pressing ctrl+option+space with voice over enabled

[andreasanheuser]

Description

With voice over enabled, focussing the dropdown reads out "press ctrl option space to display a list of options". Pressing this combination reads out an acknowledgment that the combination has been pressed but the dropdown remains closed. Only enter actually opens it.

Expected outcome

Dropdown opens when pressing "ctrl+option+space"

Actual outcome

Nothing happens

Live demo

Reproducible on demo site: https://www.webcomponents.org/element/@polymer/paper-dropdown-menu/demo/demo/index.html

Browsers Affected

• Chrome
• Firefox
• Safari 13
• [?] Safari 9
• [?] Safari 8
• [?] Safari 7
• Edge
• [?] IE 11
• [?] IE 10