Cannot breed llamas using haybale (they are not trader llamas)

When I tame a llama that isn't a wandering trader's llama and feed them haybale, they don't breed as the Feed button is the Ride button.

To reproduce
1. Tame 2 adult llamas (not a trader llama)
2. get haybale

Expected results
"feed" button should be shown instead of "ride".

Observed results
"ride" button is shown.