User registration emails turned off by default

As of 24.0, but still occurring on 24.1, the wp_send_new_user_notification_to_user filter is by default always set to false due to an override in Core\Wp_Hooks.php. I’m not sure if this was intended or not, but it broke workflows for our site with custom registration emails that we were handling independently of the plugin, because it by default flipped the filter to false. I was able to do a workaround by adding another filter myself with higher priority setting it back to true, but I imagine this change was not intended behavior.

I recommend only modifying this filter if the user has explicitly enabled / disabled it through the plugin. We don’t even have Premium, so I couldn’t see this setting at all until I looked at the source.