Well unfortunately I have the same problem and I haven’t found a solution so far. Ableton uses the same algorithms and everything is butter smooth there. Must be a problem within Cubase.
The only algorithm that kinda works for me most of the time without the glitches & pops is “standard-drums”. I set that up as the default algorithm in preferences & only switch to the more " advanced " ones when I really feel like I need them.
The weird part is that even when set to one of the tape-algorithms the pops still occur, even though there shouldn’t be any heavy processing going on with this particular algorithm…