When there is no signal, the voltage at C16 is zero because the LT1001 opamp has a very low input bias current and the voltage across R17 is also at zero, then there is no POP.
But when there is a signal then you might be switching when there is a fairly high signal level or a level clamped by the distortion diodes which results in a POP unless you ramp down the signal level for a moment before switching then ramp it back up after switching.
But when there is a signal then you might be switching when there is a fairly high signal level or a level clamped by the distortion diodes which results in a POP unless you ramp down the signal level for a moment before switching then ramp it back up after switching.