Automatic Sub and Tactic Swap.

Hi, Just started playing FM18. Downloaded some tactics from the Steam Forum and one of them I use has automatically substituted one of my players and changed my formation at the same time in the first half. Its done this twice. I have enabled match plans but nono of them instruct a tactical swap. Anyone got any ideas please or is it just a bug in that tactic?

WHO WAS IT BY AND WHAT ONE