Issue 1:
Constraint (even if I turn off "Enable Rest Position" in the Constraint Attributes) makes the Constrained object jump to random place, after which I have to manually re-position by keyframing it immediately on the frame in which Constraint turns on for that object.
Issue 2:
When removing Constraint, which should be easy enough, the Constrained object now is messed up in position at some point even when its keyframes do not change at all in the Graph Editor.
Issue 3:
It is SO time-consuming to constantly go back and forth in time, just to get the constrained object in the correct position, because the Constrained object WILL NOT behave as expected depending on how finnicky you are with moving the Time needle.
