Are you sure the error is caused by this mod? My decouplers only decouple one way, and sometimes the node can get too close and you can attach the part at the bottom instead of the top and decouple the wrong way, just be sure you have attached it correctly, use node toggle to be precise, turn of the bottom node if you want to use the top and turn off the top node if you want to use the bottom to avoid decoupling the bottom instead of the top.