Parity between the effect of clicking the selected emoji on the left and right side

[relsqui]

When I have a combination up and I click the selected right-side emoji (next to the search bar), it randomizes just the right side. So I expected that when I clicked the selected left-side emoji it would randomize just the left side, but it doesn't; it randomizes the left side and also wipes out the right side. Maybe it's just randomizing the left and hitting a combination that wouldn't work on the right? But I would expect it to limit to available combinations, like the right side does.

I don't know if this is a bug or a feature request, because I don't know how it's intended to work, but it was unexpected and confusing.