Warnings on importing contacts - PHP 7.2

While importing contacts from a CSV file, seeing the following on hitting "Continue" immediately following file upload:

Warning: count(): Parameter must be an array or an object that implements Countable in HTML_QuickForm_hierselect->setValue() (line 262 of ...civicrm/packages/HTML/QuickForm/hierselect.php).
Warning: count(): Parameter must be an array or an object that implements Countable in HTML_QuickForm_hierselect->setValue() (line 262 of ...civicrm/packages/HTML/QuickForm/hierselect.php).
Warning: count(): Parameter must be an array or an object that implements Countable in HTML_QuickForm_hierselect->setValue() (line 262 of ...civicrm/packages/HTML/QuickForm/hierselect.php).
Warning: count(): Parameter must be an array or an object that implements Countable in HTML_QuickForm_hierselect->setValue() (line 262 of ...civicrm/packages/HTML/QuickForm/hierselect.php).

Using the following settings if this helps replicate (everything else set at default:

• First Row Contains Column headers on
• Duplicate contacts set to fill
• Dedupe rule checking name and address
• Geocoding address on import