jquery 3.3.1
Bootstrap 4.1.3
Datepicker 1.8.0
With Firefox 64.0, i get documented behavior (datepicker pops up when I click on the text box). With Chrome 71.0.3578.98, I get an extra text popup that I have to click in order to see the datepicker underneath it. I don't think this is Chrome's "datepicker" interfering (I am using type="text").
<input type="text" id="startDate" class="form-control mx-sm-3" required>
...
<script>
$(document).ready(function() {
$('#startDate').datepicker({
format: 'yyyy-mm-dd'
});
});
</script>
Here's what it looks like in Firefox:

and here's what it looks like in Chrome (before I click to dismiss the extra text popup:

Ideas?