Something is getting onto the other control lines when you switch to CW. Hang a scope on them and see what is there. It may be necessary to decouple the lines very strongly. A small Pi network is the usual method used in commercial kit. It's simply a C-L-C network. There are SMD components designed to do that, and you will see them on almost every on every wire going on or off board, and they use dozens of them. Obviously a Home brew solution will use discrete components. Shielded control wires is another option.
Something is getting onto the other control lines when you switch to CW. Hang a scope on them and see what is there.
It may be necessary to decouple the lines very strongly. A small Pi network is the usual method used in commercial kit. It's simply a C-L-C network. There are SMD components designed to do that, and you will see them on almost every on every wire going on or off board, and they use dozens of them. Obviously a Home brew solution will use discrete components.
Shielded control wires is another option.