Boards›Report a Bug

@Riot BUGGED Summoner Spell CDR interactions (Insight/Ionian Boots/Distortion)

SwordGrunt·11/12/2015, 6:32:51 PM·19 votes·4,941 views

Edit: most reliable way to reproduce this bug - have "Insight" mastery, buy , you will have 225 second cooldown , after using it (may not update for a while) it will go up to 255 second cooldown and if you sell it goes up to 285 seconds.

So I've noticed very weird interactions when stacking those sources of summoner spell cooldown reduction. For instance, I start the game with on a 255 second cooldown, since it has 15% reduced cooldown from the Insight mastery. Then I buy Ionian boots to further reduce it by 10%, and it did (I'm fairly sure it went down to a 225 cooldown, meaning additive stacking). Yet at some point later, likely after using flash, it was back to a 255 second cooldown (???) and upon selling Ionian boots it was sent up to 285 seconds (increased by 10%).

I am currently trying to record some of these interactions in a custom game and will post them here as soon as I have videos up. If anyone else has experienced them, please reply to keep this thread visible and hopefully get this fixed as soon as possible.

10 Comments

SwordGrunt11/12/2015, 7:47:15 PM5 votes

Ok, I can't seem to reliably reproduce this for whatever reason. This is what the summoner 4 cooldowns are (and I assume should be):

-15% from mastery: 255 seconds (-15%)

-10% from item 3158 : 225 seconds (-10%, additively stacking with the mastery)

--20% from item 1333 : 191 seconds (multiplicative stacking? I can't find what brings it to this number, but whatever)

However, I've had my summoner 4 cooldown at 217 seconds with all of those multiple times before, which made me believe Distortion was practically useless since it was effectively shaving 8 seconds off the cooldown (less than 3%).

And as I mentioned in my original post, at one point it also had a 285 second cooldown, which should be impossible as that is a 5% reduction only.

Again, I don't know how to reliably reproduce this. I'm fairly certain it has to do with buying either the boots or the enchantment for the first time while summoner 4 is on cooldown.

Note that, if anyone tests this, the summoner spell cooldowns take several seconds to update when you buy/sell one of the items affecting them.

SympleSynz11/12/2015, 9:51:20 PM2 votes

So I was looking at your math and though it seems that a bug does exist, I'm not sure all the math was complete. Assuming you have 5 pts in Insight and 1 pt in Intelligence. That gives a starting of %20 CDR on Flash immediately.

Flash original cooldown is 300

insight, 5% CDR: 300 (.05) = 15 : 285
intelligence, 15% CDR: 300 (.15) = 45 : 255
Boots of Ionian, 10% CDR: 300 (.1) = 30 : 270
insight + intelligence + Boots of Ionian, 30% CDR: 300 (.3) = 90 : 210

I'll try it out when I get home to see if I get the same results as you

Leaf of the lake11/22/2015, 12:43:49 AM2 votes

This really needs to be seen

Haunt11/12/2015, 6:40:11 PM2 votes

riot pls fix ty

SympleSynz11/12/2015, 6:44:58 PM2 votes

Good catch. Hope you can duplicate the problem.

SwordGrunt11/22/2015, 1:16:32 AM1 votes

I'm hoping they've already noticed it, seeing as it's not all that obscure to attempt to stack summoner spell cooldown reduction, something that has never been so easy to obtain as now, and then check on how much cooldown you've saved - only to notice it's messing up.

Cortan11/13/2015, 10:33:56 AM1 votes

I have had this issue as well. I was testing it on Galio to see how low I could get flash to and with the mastery, Ionion boots and distortion enchant it was down to 191 seconds. Sometime later it went back up to 217 seconds and upon selling the shoes it went up to 285, same value you had. My teleport had the same cooldown as well at all times and I hadn't used it at all so I don't know if using the spell changes the value. Here's to Riot fixing this.

SwordGrunt11/14/2015, 12:06:41 AM1 votes

Does anyone else have any information on this? I wish we could get enough attention to this thread for a Rioter to see it as this is a pretty huge bug considering how good and obtainable summoner spell CDR is now.

SwordGrunt11/14/2015, 4:53:40 PM1 votes

Bump