Cable parting on boom vang (again)

Yesterday sailing to my marina from the demarkation line a ferry past in front carrying a steep wake. I was moving down wind in 16-17 kts tws, with full main and some tension on my boom vang. When i met the wake, the bow went up and then down hard, the boom vang ss cable immediately parted. this is the second time this has occurred. My plan is to double the ss wire size to 1/4” and double or triple crimp both ends.

Has this happened to anyone else i think the long boom exerts quite a lot of force on that vang.

My vang came off the boom and I thought about fixing it with a steel plate