During phase 2 of the fight with the final boss of the first dungeon there is a color phase where you must take the floating colors to the like towers in each corner.  Normally these stick to you like glue, but at other times they totally ignore you.  Normally this type of lag/desync only occurs during node or seige war times, so the dungeon community avoids those times, but now it's been occuring regularly since Saturday.  We tried 4 seperate times to do the boss and each time we get the same lagged color phase where the colors simply refuse to follow you, or they follow for a second or two then trail off even while going at a snail pace. 

We've wasted like 7 hours total this past week on this boss because of this bug.  Below is a video illustrating the problem.  Saturday afternoon I did this boss, the color phase worked perfect we one shotted it.  Saturday night was color lag and we couldn't kill.  Monday night, we had color lag again and couldn't kill.  Wednesday after patch we tried again and it was again color lag and couldn't kill.  Please fix, thanks!

Don't hit boss during color phase, if you have person tanking it, that person must not hit boss. also don't use any taunts on boss (taunt pets). Its can be seen from your video that someone fight boss in corner = recipe for colors don't follow players

That is an intended mechanic?

There is no logs to prove anything in BDO. Its might be intended mechanics, or its work around that only helps my group, no one can tell anything for sure. Like from my personal experiences i can say that person who fight/tank boss during color phase usually have all colors around attached to him  while no one else can even bring 1 color.

Will have to give it a try and see if it helps, thanks for the advice.