Yes — this is generally normal behavior on the X-E1/XF 35mm f/1.4 combination. The chattering/clicking you hear when half-pressing or releasing the shutter is typically the lens aperture adjusting for metering, not necessarily a fault. Early Fujifilm X bodies were known for this behavior, and firmware reduced how often it happened, but it can still occur during normal operation. If the lens focuses and exposes normally, the noise alone usually isn’t a sign of a defective lens.