Spice model for analog devices instrumentation amplifier giving unexpected outputs
Most OP AMPs and INA’s do not work with Vin (CM) near the positive rail, so selection matters.  If one scales each input to gnd to stay within this range, the R tolerance degrades the CMRR by this error tolerance.  So for high side current sensing, they have designed high side current sense Differential Amps for this type of application.  You can roll your own or choose a high side Current sense amp.