Foundation-sites: F6.5 Drilldown Submenu height calculation wrong when toggled

[magic-77]

I'm using the Drilldown Menu in combination with Responsive Navigation and Top Bar.

What should happen?

When Drilldown is closed and reopened after navigating to a submenu, height for ".is-drilldown"
should be height of ".is-drilldown-submenu.is-active"

What happens instead?

seems that height for ".is-drilldown" is recalculated from "ul.drilldown".
This results in overlapping active Submenu over Main Menu, if Main Menu is heighter
than Submenu

Possible Solution

Test Case and/or Steps to Reproduce

Test Case:
https://codepen.io/magic77/pen/vagxYL

How to reproduce:

1. Scale your browser down to see the toggle Button
2. Open Mobile Menu, and click "Produkte OPEN ME"
3. Click "Produkte 2 OPEN ME"
4. Close and reopen Mobile Menu

Context

Your Environment

• Foundation version(s) used: 6.5.0-rc.2
• Browser(s) name and version(s): Chrome 67.0.3396.99
• Operating System and version (desktop or mobile): Mint Linux 18.3, Desktop

Checklist (all required):

• [x] I have read and follow the CONTRIBUTING.md document.
• [x] There are no other issues similar to this one.
• [x] The issue title is descriptive.
• [x] The template is correctly filled.

[ncoden]

Hi @magic-77. Thank you for the report and the test case! I'm working on a fix.
See https://github.com/zurb/foundation-sites/pull/11425