Thank you for your player-report, Faustin.
It will take a while for it to be reviewed by our staff-members.
Meanwhile, the accused player and witnesses may reply to this report.
It can vary on the type of keyboard. For example, mechanical keyboards are more likely to experience this issue as they age and degrade.
With consideration of evidence, it is clear the accused user is aware of the issue and moves to repair it, afterwards promptly apologising for the problem caused. In addition, it seems unlikely that intentional spam would only happen over a period of 3 seconds. One would at least assume it would continue until a response is received.
With that,
Denied.