I would go 1u MLCC also, I’ve found that sometimes E-caps can let a little DC voltage leak through. If this happens at this point in the circuit, then a little dc voltage builds up on the output and causes a pop when switching.
Film works too, as mentioned. I haven’t had any issues I’ve noticed myself with 1u MLCC in the signal path, and Robert uses them in the fv-1 boards so he’s not opposed