Happens all the time when opera companies stage Wagner Ring Cycles. It's supposedly about the voice... but I believe there is bias in castings to be as PC as possible. I was at a production of Die Fliegender Höllander at the Bayreuth Festspielhaus in Germany and the crowd actually booed the performance.
I wouldn’t be too happy about that either. I would want to be immersed in all that Norse mythology, and not seeing Amazonian, blonde Helgas would ruin the atmosphere. It’s not just the singing, it’s the whole immersion, with opera.
That’s a touugh crowd that boos an opera.