Okay. So here’s what I did…
OSC2 is the only audible sound source. OSC1 & OSC2 set up similarly with tracking enabled. Both LFOs had similar settings, too.
a) No modulation
b) LFO1 modulating OSC2’s pitch
c) LFO2 modulating OSC2’s pitch
Observation: There seems to be a significant difference in number of harmonics (up to noise) being produced when using LFO2 to modulate OSC2’s pitch. If that is feedback or something else might be answered by someone else. Either way you seem to “lose” the fundamental, which was in this case at around 82hz.