I haven't been able to reproduce this, but when I'm using the Alex voice with VoiceOver on Mac, the voice will randomly change to a high pitch and rate, I have usually found this behaviour when checking the time or just navigating the screen. The voice doesn't sound as if the pitch is set to 100%, rather, the voice seems to lose its human quality and sound very robotic, higher pitched and fast.
Has anyone experienced this? Do they know how to stop this from randomly happening/ I noticed this with 11.2.1 as this hasn't happened before.
macOS 11.2.1 running on 2018 Intel MacBook Pro 13" 8 GB/512 GB.