I am powering a few op-amps from a split supply made from a 7805 and 7905. Before connecting the amps, I measured the outputs from both regulators and got 5V and -5V, respectively. However, after I soldered down the amps, I observe -0.9V at the 7805 output pin (the 7905 functions properly). The 7805 is not getting hot, and I am not measuring any shorts between 5V and -5V, 5V and GND, or -5V and GND. I am measuring 7.5V at the input to the 7805, as expected. I tried replacing the part as well, but this behavior persisted. When I remove the 7805 and connect a benchtop supply in its place, the circuit functions as expected and my supply reads a current draw of about 100mA. I am not sure what else to check. How can I go about solving this?
The schematic is as follows, duplicated 5 times:
Edit: Yes, I know the pinout for the 7905 is wrong. I have rerouted the pins to the correct traces on the board itself, and the 7905 functions properly.