Link of cloned decision block is disconnected when update attributes on master block.
Steps to reproduce:
1. Create a decision block.
2. Add Output to the block. In this case, outputs of the block are A, B, C.
3. Clone the block.
4. Connect output A and B from master block. Connect output A and C from cloned block.
5. Update any attributes like Notes of master block, and then output C is unlinked from cloned block.