Overflowing labels in CheckboxList don't break correctly with Bootstrap 4

[NicoNuernberger]

Steps to reproduce the issue

1. Setup Yii2 with Bootstrap 4
2. Create a form and within that form create a checkbox list for a model. Ensure that the list of checkboxes is rendered within a container with a limited width and that the list of choices contains at least one string long enough to surpass the width of the container. My example: $form->field($formModel, 'answers', [ 'showRequiredIndicator' => false, ])->checkboxList($formModel->possibleAnswerStrings);
3. Check the rendered view

Expected behavior and actual behavior

On 1.60, the checkbox list behaves as expected with Bootstrap 4: With the following HTML: Pastebin

On 1.6.1 and upwards i get the following however: With the following HTML: Pastebin

Environment

Browsers

• [x] Google Chrome
• [x] Mozilla Firefox
• [x] Internet Explorer
• [ ] Safari

Operating System

• [X] Windows
• [ ] Mac OS X
• [X] Linux
• [ ] Mobile

Libraries

• jQuery version: v3.6.0
• yii2-widget-activeform version: from 1.6.1 upwards
• Bootstrap 4.6.2

Isolating the problem

• [ ] This bug happens on the demos page
• [x] The bug happens consistently across all tested browsers
• [ ] This bug happens when using yii2-widget-activeform without other plugins.