In addition to releasing the iOS 16.3.1 update today, Apple also released a new 16.3.2 update for the first-generation HomePod, HomePod mini, and second-generation HomePod.
According to Apple’s official changelog, HomePod version 16.3.2 resolves a persistent issue with HomeKit-related Siri requests.
"This update fixes an issue where smart home requests to Siri might fail, and also introduces general performance and stability improvements."