Issue with users access across multiple channels in V14.6.0

Hello Team,

We have multiple channels in our project where one of the user is assigned to editor group of channel 1 and author group of channel 2.

While testing this use case, we have found that he is able to perform editor activities for both the channels rather than only in channel 1. we have tried replicating the same scenario in vanilla version of V14.6.0, same has been identified.

Could you please help us in solving this issue ?

For creating groups, users and domains we have followed the steps mentioned in below link. Please let me know if any additional change has to be performed to achieve this case.