dropdown.js: _completeHide results in uncaught TypeError

[StijnClaessens]

Prerequisites

• I have searched for duplicate or closed issues
• I have validated any HTML to avoid common problems
• I have read the contributing guidelines

Describe the issue

When using the dropdown functionality, after you select an option from the dropdown, the dropdown.js _completeHide function results in an uncaught TypeError.

Explicitly returning focus to the trigger element fails because this._element is null
see dropdown.js line 212

Reduced test cases

see for instance Havit Autosuggest control
use the control
select an option from the dropdown either by clicking by mouse or enter button
an error is logged in console

What operating system(s) are you seeing the problem on?

Windows

What browser(s) are you seeing the problem on?

Microsoft Edge

What version of Bootstrap are you using?

v5.3.6