Why is not working with Pseudo GND?

[SpoNNw]

Hi, I’m working on a small project to capture EMG signals, and I plan to read them using a microcontroller’s ADC. In a very general overview my setup includes an instrumentation amplifier (AD620ANZ), a second-order bandpass filter to capture frequencies from 20 Hz to 500 Hz, full wave rectifier amp op, and last a peak detector. However, I need a dual-rail power supply (+12V and -12V) to power my ampOps, the ideal solution would probably be using a dual power supply, which I don't have. After doing some quick research, I found that using a voltage divider and a buffer configuration might be sufficient to generate the dual-rail voltage. The issue I'm encountering is that my differential amplifier works perfectly fine with V+ and V- supplied from dual sources of -12V and +12V, along with their respective ground. However, when I apply a voltage divider and a buffer configuration and generate a PseudoGND, something strange occurs in my simulation circuit (LTspice); I might be doing something wrong! I expected to have +12V and -12V connected to the supply terminals, instead it, I'm having -24V at V+ and -48V at V- ! Can someone pls help?

https://prnt.sc/i4rFAIj2ZGAT Dual Supply (Working fine)

https://prnt.sc/loR_ikVnlpnk GND configuration

[ledtester]

It would help if you could post the .asc file and the relevant component models.

What happens when you just use the UniversalOpAmp model instead of a LM741 for the rail splitter?

I have a feeling that SPICE doesn't handle this case very well -- attaching GND to the output of the LM741. I would just attach ground to a more conventional location and subtract the value of PseudoGND from whatever voltage node you want to plot.