Unknown Google account added

Hi!

On different systems/laptops, generally Mac OS X Sierra/High Sierra, unexpectedly appears message - "Google Account Added" with unknown email.

For example:

1. MacBook#1 and iPhone#1 with Apple ID user1@domain.com.

On MacBook#1 in Internet Accounts exist accoun0@gmail.com.

On iPhone#1 we added Google account account1@gmail.com.

On MacBook#1 appears message - "Google Account Added" with email unknownuser@gmail.com.

2. MacBook#2 with Apple ID user2@domain.com.

Apple ID for iPhone#1 we change to user2@domain.com and we added Google account account1@gmail.com.

On MacBook#2 appears message - "Google Account Added" with email accoun0@gmail.com.

3. Apple ID for iPhone#1 we change to user1@domain.com and we added Google account account2@gmail.com.

On MacBook#1 appears message - "Google Account Added" with email user2@domain.com.

Could you please explain why this situation happens?

How can we fix it?

Thank you!