Unlicensed users appear in the most recent contributors; how is that possible?

Question

Hello, we've notices that in the Recent Contributors in our space in Confluence, we see unlicensed users that haven't been part of the company for more than a year, although it Recent Contributors across their name it shows (an hour ago)

How is that possible?
Also, In Atlassian Admin I checked for their accounts but they aren't listed so they shouldn't have access to our space

Thanks

Andy Gladstone · Answer

@Krum Etov checking in here. Any changes?

Andy Gladstone · Answer

@Krum Etov if the activity is registering to a previously licensed user that is currently unlicensed, even if there was public access and the user was able to contribute/edit it would not register to their user. Do you by any chance have automations running that were built by this user that may still be firing and 'attributing' the activity to the user? Have you looked at the page history for the page(s) where these contributions are being logged to see what changed?

Krum Etov · Answer

Also, in Space Settings->Space permissions-Guest users I have no users added so I assume there is no external access. Unless there is another place to grand such access? 
Thank you