[NaderHussain]

Which Pixel 8 apps are you experiencing these issues with?

 

[NaderHussain]

You might want to take a look at the below link and its summary for more information regarding this issue with Google Calendar.

Here are some common causes: Syncing issues: Sometimes events can disappear if there's a syncing issue between your devices and Google Calendar. Make sure that all your devices are connected to the internet and synced properly. Accidental deletion: It's possible that events were accidentally deleted. Aug 9, 2022

Why are events disappearing from my Google Calendar?

Source: Google Search

The linked website may hold the causes of the problem. If not, feel free to get back to us regarding the disappearing Google Calendar events issue. We will look into it more at that point.