Ask HN: Primary Google calendar data getting shared without my consent

Hi,

I recently saw that in the "Share with specific people" settings of my primary Google calendar, it says I'm sharing all my private event data with my mom. I tried to remove her but she reappears every time I refresh the page.

I tried moving all my events to a new calendar (within google calendar), but on android, new events still automatically get added to the primary calendar.

Is there anything I can do to fix this except switch to a completely new app/infrastructure? In this case, does anyone have any recommendations?