Just confirming, I have the same issue on my machine. Running version 1.4.0.4061 with macOS Catalina 10.15.7 = reverb part works, kick sound is dry.
Urs Heckmann's Twangström spring reverb has an automation-capable "twang" parameter to simulate hitting or kicking an amp. Seems like that would render more realistic results than a kick audio impulse, anyway — since you need to model the physical movement of the springs, not just a loud audio input. I wonder why Arturia didn't just do that.
(the same way I wonder why they got rid of the CS-80 multi mode instead of going the Cherry Audio route with a CS-80 / GX-1 fusion … and why you can't have a user instrument in Mellotron V with 35 custom samples, which makes a hell of a lot more sense than 8 … and why Synthi V has no external audio input … and why …)