Dynamic Data "PHP Function Return Value" with no parameters given overrides first parameter default value with empty string

Describe the bug

A clear and concise description of what the bug is. I created a simple PHP function: function paramTester($parameter="default") { return 'Parameter value: ('.$parameter.')'; }

When called using Insert Dynamic Data's PHP Function Return value feature, even if I supply NO parameter values, it calls the function with an empty string as the first parameter (which prevents the default value from being applied).

A link to a Sandbox site where the bug has been reproduced https://oxygenbuilder.com/try? (REQUIRED) https://oxygen-qq7dphz4lpfvl.oxygen-demo.qsandbox.org/home/

Look at the homepage just below the "start now" and "learn more" buttons. The function can be found in a code block just before the text module showing the function results.

soflyy / oxygen-bugs-and-features

Dynamic Data "PHP Function Return Value" with no parameters given overrides first parameter default value with empty string #3404