It works there too.
If you're also using that exparam fix plugin I also uploaded, it's not needed if you're using the dual wield menu extension, and it probably overwrites something that causes this. Otherwise, just having an escape code seems to work fine, at least for showing icons. Admittedly, it looks kind of janky in the screenshot, but that's because I just quickly set it to use four columns on the default resolution.
Also, Block Percent (amount) and Block Chance are not the same thing. Block Chance is the rate at which a shield will block an attack successfully (ie: 70% of incoming physical hits will be blocked), while Block Percent is the amount of damage the successful block removes from the incoming hit. With the default parameters set, a block stops 100% of incoming damage blockchance % of the time. If you change that first number to something lower than 100%, it will not remove all damage, but a portion, similar to how blocking in a game like World of Warcraft works.
-Ramza