This seems like a general UI bug.

Q: For those amongst us who are UI experts, what is it called when dynamic lists populate unpredictably while a finger-tap is in-progress?

a) start query and see initial results

b) start finger-navigation, moving finger over initial results

c) start finger-tap descent

d) underlying list is updated, replacing future finger-tap destination's UI element with another

e) finger-tap meets different element than intended