I found a user with a network wide suspension but having >1 reputation on 2 sites.
Upon request by Staff/Moderator I can provide the user address if it is a bug but at the moment I am looking forward to know how is this possible.
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This was very likely a race condition completely at my own fault. I triggered an account merge almost immediately after issuing the network suspension, which caused the account's Id number to change and for the code to fail to network-suspend the remainder of the profiles. I should have waited until all the profiles were suspended before doing that.