What isTrust certificate

Two of the same title ASC threads contain reference to this issue

~ one points to part calendar iPad/iPhone as behind the problem:

Global internet telemetry measurement collective LLC - Apple Community (link/solved)

//discussions.apple.com/thread/254781263?answerId=258914616022#258914616022

[According to 'helpful reply by user-contributor' ProustGiulio]

"Try this workaround: Settings>Calendar>Accounts... and see if you

have a calendar subscription you accidentally subscribed to. ~ If this

is the case, delete that calendar account, then restart your iPhone."

Most times, this affects iPhone iOS; but iPadOS could be as well.

If you can help this OP, another user had the same question not long ago:

what iit is global internet telemetry mea… - Apple Community

Thanks.

This seems to be a new issue:

https://discussions.apple.com/thread/254780983

Posted today and has 524 Me Too’s

And they seem to have found a way to fix it.

Look for a any unrecognized subscribed calendar, and remove it.

Delete spam calendars and events on iPhone - Apple Support

xiring Said:

"Why asking me Global Internet Telemetry Measurem."

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Googling this:

See if anything found here helps: "Global Internet Telemetry Measurem..." site:discussions.apple.com