Hi there.
Can you give us a way to replicate the problem? Like, from the INIT patch, the minimum programming needed to replicate it.
Just tried all manners of using a sawtooth LFO to modulate cutoff, but I can't get it to "pop" other than when I add other stuff like rectifier saturation, or when using something like the arpeggiator clocked to the same speed (along with punch intensity enabled, etc.).