We have a work colleague in our small team that goes of sick (fully paid) with mental health or physical health prior to going on annual leave to lovely places.Its happened 4 times now at least. When they are in work they are mostly great, if a little intense but the pattern of absence has been noticed by all our colleagues but not management it seems. Am I being unreasonable to be at my wits end with what appears to be someone taking the mick??