Are you starting up the game with LSPDFR plugin already loaded?
You can find out by starting up RAGE, then clicking the small gear in the bottom left corner of the RAGE loading screen before the actual game starts.
Once the settings screen pops up, go to "Plugins" and if you see "Load these plugins on startup" selected, then you should select "Don't load any plugins on startup."
Now click "Save and Launch" in the bottom right corner. When the game loads, you'll need to press F4 to open the console and load your plugins from there.
I had an issue similar to this long ago and this was how I fixed it.
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Here you can see the Gear icon in the bottom left corner that was mentioned previously.