[React] IxDateDropdown null pointer after switching to custom range and back

Prerequisites

[X] I have read the Contributing Guidelines.
[X] I have not leaked any internal/restricted information like screenshots, videos, code snippets, links etc.

What happened?

When using the IxDateDropdown, there is some kind of null pointer exception when you do the following:

click the drop down button (to open it)
select "Custom ..."
click the drop down button (to close it)
click the drop down button (to open it)
select "Last 7 days"
click the drop down button (to close it)

This raises

Uncaught TypeError: Cannot read properties of undefined (reading 'isPresent')
    at DropdownController.dismiss (@siemens_ix-react.js?v=1f08deba:5141:18)
    at DropdownController.dismissChildren (@siemens_ix-react.js?v=1f08deba:5137:12)
    at DropdownController.dismiss (@siemens_ix-react.js?v=1f08deba:5142:12)
    at toggleController (@siemens_ix-react.js?v=1f08deba:5370:28)
    at Button2.<anonymous> (@siemens_ix-react.js?v=1f08deba:5376:9)

In production this will just log an error to the console, but in development this error will break the app due to the error message.

This not only happens when clicking the drop down button itself, but also when clicking outside the drop down. Looks like there is some null check missing in the drop down controller.

Current workaround I'm using: unique key prop on the IxDateDropdown which consists of all dynamically provided props. So the Dropdown is unmounted and re-mounted whenever it's props change.

What type of frontend framework are you seeing the problem on?

React

Which version of iX do you use?

v2.5.0

Code to produce this issue.

https://stackblitz.com/edit/tcjojk?file=src%2FApp.tsx

or

https://ix.siemens.io/docs/controls/date-dropdown/#with-user-defined-range-options

siemens / ix