Birthdays and Google Calendar API recent changes

I've used Google account with Calendar for years and there has always been a separate birthdays' calendar that could be turned off. Now, however, Apple Calendar is showing those birthdays in the main calendar.

Searching here and there, I've found that birthdays in Google Calendar are now stored on the main ('primary') calendar with a special 'birthday' flag (check https://developers.google.com/calendar/docs/release-notes?authuser=0#November_19_2024)

Since the events are now stored on the primary calendar any software (included Apple Calendar) that doesn't hide events on the primary calendar with the "birthday" eventType will show duplicates if both the primary and birthday calendars are enabled.

Check this out for further details https://support.google.com/calendar/thread/312079818/birthdays-suddenly-showing-up-in-subscribed-google-calendars?hl=en&authuser=0

This affects every version of Calendar (i.e. iPhone, iPad and Mac)

Please fix this as I very much doubt Google will revert this.

Thanks