Udyr's Lifesteal tooltip not showing correctly

In a game I just played as Udyr (game ended at 4pm PST on 1/5/2015), at 30 minutes I had a Essence Reaver (10% lifesteal) and 2 ranks in W (Turtle, 12% lifesteal). Hitting "C" only showed me having 12% lifesteal.

At 34 minutes, I had added 2 more W ranks but the tooltip still only showed 12%.

At 38 minutes, I added a Bilgewater Cutlass (8%) and the tooltip "C" now showed 20% lifesteal.

At 39:30 I died, and hitting C, it showed me at 38% (which was correct). Just wanted to point this out. Thanks!