I've been trying to make a simple bass in both Operator and Analog, and for some reason, both are clicking hysterically on my current midi arrangement.
I spent the last hour messing with the ASDRb (I immediately assumed it was the attack), glide, length of the midi notes on the grid, phase, and still no luck. It is an extremely simple midi arrangement as well. I've also tried different buffer sizes, and it still happens at the highest setting. I'm on a Macbook Pro with 16g of RAM and a fast CPU. I'm on the latest build of Live Suite (9.7.1).
To make sure I wasn't going insane, I threw in Serum, and BOOM. No clicking! Only when I put the attack crazy low (sub 20ms), did it click.

Dylan