Animator IK mode time frame keep going back to the previous time frame

  1. What do you want to achieve? I want to use animator ik mode

  2. What is the issue? the issue is that every time a selected another time frame and when I move/rotate a part it goes back to the previous time frame

  3. What solutions have you thought of so far? I tried resetting Roblox studio, made a fresh animation but nothing works

does anyone know how to fix it???