Also that stuff last year in China. The key seems to be not to be the very most prominent award; Locus and BSFA and Nebula and so on seem to have a lot less strife.
The strife is more obvious with the Hugo than Locus/BSFA/Nebula because the Hugo has an intentionally open voting membership. Anyone with interest and the cost of a membership may vote. Voting blocs have to be public attempts to sway popular opinion. That very nature of it forces it to be public drama.
Some of the Chinese controversy about the Chengdu's WorldCon last year was as much about that natural sway in attending membership simply by being hosted in a controversial country like China no matter what else happened. It's called WorldCon for that reason and that sway in voting membership was always somewhat intentional to keep the Hugo Awards worldly and diverse. Some people were always going to have issues with a Chines WorldCon, even if they didn't also end up very publicly making mistakes.
Some of the Chinese controversy about the Chengdu's WorldCon last year was as much about that natural sway in attending membership simply by being hosted in a controversial country like China no matter what else happened. It's called WorldCon for that reason and that sway in voting membership was always somewhat intentional to keep the Hugo Awards worldly and diverse. Some people were always going to have issues with a Chines WorldCon, even if they didn't also end up very publicly making mistakes.