[Solved] Users being kicked out randomly

To add to it, this is the log file from our AWS server showing the kickout after 17 seconds (but we also had some after just 20 milliseconds which seems like a RACE condition):

Sep 20 14:00:21.331 SessionId: MfzcfkXX5KgKeACbr with Ip: null was kicked due 15 min inactivity!
Sep 20 14:00:03.007 Finished Daily Manager for users!
Sep 20 14:00:03.007 usersQueue is 1 users. Getting their services.
Sep 20 14:00:03.006 Adding user DtvPpgeD9kExdwodn to queue daily/weekly update
Sep 20 13:59:18.993 (qD4hvtrg4kNmApgdj) Last login: Thu Sep 19 2019 11:00:14 GMT+0000 (UTC) was within 24h refresh limit
Sep 20 13:59:18.993 (qD4hvtrg4kNmApgdj) Time since last login: 68344197 ms
Sep 20 13:59:18.988 (qD4hvtrg4kNmApgdj) Login successful