Also, it's worth mentioning on the glitch, crack and click front that using the transient editor in the oscillator, or any of the other options, increases the burden. The editor is 'Remix' and that is disengaged by default. But in the 'Options' section 'Transients' is engaged by default. This emphasises the attack and is particularly useful for percussion, but I think that it is also adding to the CPU load and it can be disengaged.
It is also always worth rechecking sample starts and ends to ensure that there isn't an additional clicking coming from an ideal start or end point. Either start and end in silence or adjust the ADSR (DAHDSR in Falcon) - a slower attack faster decay as needed to avoid the clicky start or end point. This is unrelated, but the click did have me wondering at first if there was glitching when I loaded a recent sample, but it was just a noisy end to the sample.