Thank-you @smicker for hoping to put this on right path. @yassine_fadh1 without knowing how the server 'bonding' is set-up, everything else is a complete quess. I suspect (with 99+% confidence) that the Server interface that connects to port 0/0/19 is also showing 'link down'. As @smicker has stated, could very likely be expected, if the Server bonding is indeed set to "active-backup".
Assuming you have not changed many defaults on the switch, you might also want to check [R]STP status, because if Server interfaces are not set to active-backup (most likely situation), you could be have interface down via STP blocking.