CC skill duration bug in arena

[qqqq1]

so i made my warden, and was doing some pvp, on low level players my cc skills last full duration , on higher lvl over 55 my cc skills last half a sec literally , u stun them they just unstun right away . A 3sec kd they just get up right away thy didnt tab roll or any escape its literally half sec cc skill. tried on lvl 20 works. i ask region and a GOLD PERSON WAS LIKE OMG YOUR RIGHT.when i sparred her i been playing for 2 years 9 alts and i pvp on all. is this a bug