with 2 lvl iss buffs + soul bow attack speed 751, when i used rapid fire skill, attack speed raised to 901, but when i'm hiting mobs attack speed allways jumps from 901 to 751. (sorry for bad english)
really, yesterday i had the same impression. in yul archer 90 + during my solo instance kartia, i felt that my attack speed was reduced in combat mode. i remember a bug even before goddess of destruction naia where the attack speed of many of the archers had been bugged for over a week. yes your video is private.
i presume it's your subclass right? since people reported before that their silver ranger subclass is bugged when using rapid fire skill main class have no problems