Redirect Manager Tool
You can find the Redirect Manager Tool in the Admin section in Episerver.
The tool allows you to repair redirect chains, find redirects missing trailing slashes and other problems.
Note: because of the amount of redirects, the tool is quite slow to load.
Basically, scroll down to identify any redirect chains you wish to repair, check the box to the right, and press the "submit" button at the bottom right side of the screen.