Wound Strike does work properly in the base Demo Project. However, if you are editing the Demo Project (as was the case with your previous post) there could be some changes that you have made which are preventing it from working as initially implemented. Please post screencaps of the following from your project:
- Your project's Plugin Order
- Console after Wound Strike has been used (press F8 to open while in Battle)
- Screenshot of the PostLearnShuffle Common Event
If you can give us this information, we can certainly help you troubleshoot this issue further.