Bug in Blend trees

Hello !
I am working with blend trees since a week and I just noticed this weird bug, which I think, happens every time. Its a very simple 1D blend tree with only two animations for a human character. Walk --> Run. Thresholds are respectively 0 and 1. So everything is fine from 0 (100% walk) to 0.99 (99% Run) but when I set the parameter to 1 , the animation played is a blend between walk and run. While it is supposed to be 100% run, right ?
Did anyone of you have this problem before ?
Thank you for your help !

 

Never heard of this issue before.

Please log a bug with your project and we will take a look