Ok, I see. Unfortunately, I can't tell you why that's happening. It might be some subtle change they made in the system update -- not sure if it was intentional or not.
It doesn't matter if you close all of the tabs, right? So if there's only one tab open, and then you click on two separate links, they both still override whatever was on the same tab?
See what happens if you go to the App Manager, select Chrome, and Clear Cache/Clear Data. If that doesn't do anything, try wiping the cache partition:
https://support.t-mobile.com/docs/DOC-30240