Steps to reproduce

1. Go to a place where an autocomplete form element is used such as the the course Participants page
2. Make a selection
3. Observe the HTML of the selected item

Expected result:

The DIV generated by the lib/templates/form_autocomplete_selection.mustache should be used.

Actual behaviour:

The DIV is generated and its content is replaced with itself, effectively leading to having two duplicate DIVs with the same attributes. For example:

<div class="form-autocomplete-selection w-100 form-autocomplete-multiple" id="form_autocomplete_selection-1575446610531" role="list" aria-atomic="true" tabindex="0" aria-multiselectable="true">

<div class="form-autocomplete-selection w-100 form-autocomplete-multiple" id="form_autocomplete_selection-1575446610531" role="list" aria-atomic="true" tabindex="0" aria-multiselectable="true">

    <span class="accesshide">Selected items:</span>