Yasuos with Statikk Shiv and Infinity Edge does less damage than it should.

While messing around with Yasuo in a custom game, I noticed a bug related to critical strikes with shiv when he has both shiv and IE. Normally, a crit with shiv makes the shiv proc do 180 magic damage (with no modifiers) because of Yasuo's crit damage penalty, since his crits effectively do 1.8 times damage instead of 2.0. With IE, that crit damage modifier is increased to 225% for Yasuo, so his shiv crits with IE should do 225 damage. Instead they only did 219 damage, and it was like this every time. His auto damage crits for 225% as they should. I tested this again in a second custom game and was able to replicate it. All of this was tested with no runes or masteries against minions that have 0 armor and 0 MR. To see if the problem was with Shiv or Yasuo, I bought both IE and Shiv with Ashe as well, and her shiv crits did the full 250 damage as they should, so it appears to be a Yasuo specific bug.