Tow Thomas biquad filter output amplitude is increasing as I increase frequency
It might work with an ideal op-amp but you are asking too much from the op-amp.
Even the LM348 datasheet is from 1979, and the op-amp has gain-bandwidth only up to 1 MHz.
Capacitor impedance gets lower as frequency rises, and as as the op-amp non-idealities start to get larger when frequency rises, the signal will pass via capacitors and the non-ideal op-amp can't remove it.