Automation Problem probably by me

Hi all I hope everyone is having a good day/night depending on where you are. I have a bit of dilemma with my DAW at the minute and i was wondering if anyone could please help me. I use Cubase 8 and tbh everything has been tickety boo up until about a month ago when the automation from my instrument/audio/fx channels stopped copying along when i duplicated a MIDI part/Audio clip it’s driving me nuts as I’m having to re-write the automation into the copied pieces please please somebody help me :confused: and thanks for reading.