String synth makes noise (pops)

Hi!
I noticed one unpleasant feature on String. When I use the piano patch from this topic
https://www.operator-1.com/index.php?p=/discussion/3417/synthesized-piano-patch

or make some similiar patches, noise randomly appears: some pops or clicks. When I record it on Tape noise dissapears.
This happens only with String.
Is it normal? Synth bug?(
Thanks

Yes this is generally a normal bug to this engine.
Didn’t know it disappeared on tape.

@Spheric_El said:
Yes this is generally a normal bug to this engine.
Didn’t know it disappeared on tape.

Thanks!
And yeah, you can record String on Tape without noise