[ILLusion]

Sounds like your leaf spring (I think that's what you're referring to as the "grip spring strips") is not seated correctly.

Their natural state is pushing forward towards the muzzle. So with that understanding, you should know that each of the prongs of the leaf spring should be resting behind the objects they are touching, and pushing those items towards the muzzle of the pistol.

Also note... reinstallation of the receiver to the grip should ALWAYS be done with the leaf spring and main spring housing removed. Installation without removing the leaf spring can potentially damage it.