I'd glue that tab down with Shoe Goo. After that, direction will hardly matter.

Is that a lump I am seeing on the far side directly above the cut? Looks like there might be cut cord under the tab. In fact, it looks like there is a diagonal raised and slightly lighter in color stripe running under/through the cut. I'm guessing that the casing cord runs exactly at that angle and some strands have broken or been cut. If it were mine, I'd limit that tires miles to rides I had spares for and don't mind changing it or within the limits of patience of my ride service. (And my luck/belief - limit the tire to that and it will last me many more miles but a solo century would probably be its last ride. And I'm getting too old for those epic days.)