Physics Freakouts during Frame Rate Drop ?

Hello all I was having an issue with the collision between two objects especially when there is a brief framerate drop and I wasn't sure the best way to handle or " water down the physics effects during frame rate dips ?

Basically right now we have two objects that we move left and right and they collide and respond to each other pretty normally . however there are certain times during our game where very intensive operations occur and if the player causes these two objects to collide with each other during this brief frame rate pause one of them basically " freaks out " and flies across the screen .

I thought of making it so no movement occurs when the frame rate drops below a certain number or maybe during these intensive operations but so far that's the only really visible fix I see at the moment