I use my google account as my main calendar. Synched on all my devices and apps. I usually receive all calendar invites there too, with all my email addresses forwarded to gmail.
Now sometimes I've started to notice that calender invites to one of my aliases don't show up anymore. Specifically the icloud privacy relay. When someone sends an email with an ICS attachment there, I see the email, I can manually add it to google calendar with a click, but it never shows up in my calendar otherwise.
This is also true for calendly appointments, if I add one of the aliases instead of gmail as my contact address. They don't show up in google calendar until I go into the email and say "add to calendar". Really frustrating.
Is there maybe a gmail addon that can solve this? Or a google account setting? I've missed a few appointments because of this