Potential Bug with brawler's gloves + Yasuo + Infinity Edge [GAMEPLAY]

I have recently read the patch notes for 8.11. From what i gathered from them it is possible to get yasuo to 100% crit strike with brawler's gloves + Zeal + Yasuo + Infinity Edge. So i decided to go into the practice tool and try it out and for some reason i only get 80% crit strike chance. After some time i found out brawler's gloves is the issue.

The Steps i took to produce this was:

1. Start game as yasuo
2. buy brawler's glove, and infinity edge in any order
3. calculates to 20% crit chance when it should be %40 crit chance

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     How it would be calculated according to item description

Now the way i assumed this would work would be +25% crit strike chance from brawler's gloves and zeal then infinity edge applies the double crit chance making crit chance 50% then yasuo passive would double it to 100% crit chance.

Sorry for the lengthy post but from what i have found this is a bug unless there is some reason it works this way. If this is working correctly then can you give me the process of how the crit chance is calculated for this situation for future reference. Thanks for taking the time to read my past.