Wrong frequency response - LTSpice
You specified a linear frequency sweep, with 50 points from 1 Hz to 120 MHz. That means the simulation is run at 1 Hz, 2.400001 MHz, 4.80001 MHz, etc., up to 120 MHz.

Most importantly, it means that the part of the output curve between 1 Hz and 2.4 MHz is generated by interpolation rather than by doing any simulations at the intermediate points. Apparently it did a linear interpolation on a linear scale, which translated to a curve when you changed your plotting axes to be logarithmic.

I'd recommend to switch to a log sweep, which is called either "decade" or "octave" sweep in LTSpice, depending whether you want to specify the number of points per decade or per octave.