Game Mechanics: Question about Resist Debuffs

[SamwiseRed]

Root resists seem to working with high enough MR however people are reporting that after tashed/malod they are being rooted with over 120+ MR. Can we get a confirmation that our displayed MR are the actual values. People are speculating that the current debuffs (tash/malo) are actually bringing our MR a lot lower than what is displayed. I have no idea how we could test this on our side. I am hoping there is a quick and easy way to test this on the dev box. Thanks.