I noticed the Announce good morning "App".
There was a recent issue with the TTS mp3 cache filling the device storage and causing issues, but usually it would be far worse than what you are getting. This would also only impact if you are using a local TTS like Sonos or AirPlay, those generate MP3 files on the cloud and are then saved on the hub to be streamed locally.
Does you TTS announcement constantly change or is it the same thing every time it goes off? If it is always changing it would create a new MP3 each time and cache it.
You could try shutting that announcement off and see if the problem comes back again.
Also 2.4.2.134 is supposed to fix that MP3 cache issue
