Deprecated function: preg_match(): Passing null to parameter #2 ($subject)

Hi developers familiar with webform!

Problem/Motivation

These deprecated functions under php 8.3 are in webform as well as in core because the same function is used.
protected static function datetimeRangeYears($string, $date = NULL) {...
The question is do I have to open another issue request for the same problem in core?

Deprecated function: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in Drupal\webform\Plugin\WebformElement\DateBase::datetimeRangeYears()
(line 678 of modules/contrib/webform/src/Plugin/WebformElement/DateBase.php).
(line 679 of modules/contrib/webform/src/Plugin/WebformElement/DateBase.php).

Deprecated function: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in Drupal\Core\Datetime\Element\DateElementBase::datetimeRangeYears()
(line 49 of core/lib/Drupal/Core/Datetime/Element/DateElementBase.php).
(line 50 of core/lib/Drupal/Core/Datetime/Element/DateElementBase.php).

Steps to reproduce

in a fresh installed drupal 10.5.4 with php 8.3.23 and webform 6.3

problem with:

if (!preg_match($year_pattern, $max_year, $matches)) {
      if (preg_match($plus_pattern, $max_year, $matches)) {

but it's also the same with $min_year;

would be nice if you could provide us with a patch;
I think it's the new syntax rule in php 8.3 which we have to use like:

if (!preg_match($year_pattern, $max_year ?? '', $matches)) {
      if (preg_match($plus_pattern, $max_year ?? '', $matches)) {

thanks and
greetings, Erich