My solution was to remove C2, the 100n cap directly connected to input in the schematic. It looks like may have been an error in the original tracing? I think it would be more likely that the cap end that connects directly to the input would be better going to ground at that spot, if it’s actually in the circuit, making it follow the input resistor and smoothing the high end even more going into the op amp. I preferred just removing the cap than directing to ground.