Firstly this bug aint nothing new, has annoyed me for a long time. Reinstall from any client version did not fix.
I may or may not be the only one with the same issue. It has to do with the Turan possession beast Carlos.
There is this skill named Energy Trap, it's aoe skill. When ever I used this skill, I noticed how my fps dropped drastically.
And it stayed that way even after beast mode was gone. None of the other skills I've tried had this bug. (I have not tried em all)
So, for a long time the only fix was to use a skill with a casting time, for example Beam Slash.
If there was no enemy to target, using a mount did the same trick. This brought the fps back to normal.
However, it does not fix it while in pb mode. This made it near unplayable in mass pvp and very annoying in pve too.
But I did some testing the other day and learned a few more things..
First thing I learned was that the skill Energy Trap had something to do with it, but more importantly Beast Armor.
I feel like an idiot now, but it had not crossed my mind before to remove the armor until last night.. suddenly, no more fps drop/lag/freezing with any skill ! (and I've been wearing it for atleast a year now)
This still doesn't explain how or why it's really happening, and for those who would like to reinforce beast armor, and have the same issue, I think this should be fixed.
I for one just bought the armor pieces for the looks. But lately I've thought about forging a +10 set, after I heard it can make a difference. Now I won't have to bother trying.
If you have a similar problem, and have not already reported it, you may reply here. I could not find a topic related to this issue yet.
Thank you for reading.