All woods absorb and release moisture as the humidity in your shop raises and lowers.the trick is to keep equal moisture all around the board. When you bring a board into your shop, place it so you get equal air movement around the board. The proper way to store new wood is to stack and sticker. That is stacking the boards with narrow, thin sticks in between the board to keep air circulating around the board untill the boardS acclimate To your shop environment. If it just a board or two, lean them against a wall or your bench so there is equal air circulation. The biggest mistake folks do is laying the board flat on a workbench. The top of the board will absorb moisture and the bottom won’t, guaranteeing the board will warp.
A good Online source for scroll ready wood is Ochooch hardwoods. But if you order from them or any source, you have to do ad above.