Several months ago Google Assistant started responding “I didn’t understand” to commands in Google automation routines that were supposed to announce something on the initiating Sonos speaker. This bug is still present and I don’t think it was ever acknowledged or addressed by Sonos or Google. Only Sonos speakers are affected - all other Google Assistant speakers continue to perform this action just fine. Fortunately there was a workaround in the case of routines that are only ever used on the Sonos speaker: modify the routine to always make the announcement specifically on the Sonos speaker rather than “on the initiating speaker”.
Today things got worse. Google Assistant on Sonos has started responding “I didn’t understand” even when the announcement in the routine is specifically sent to the Sonos speaker.
I guess this is the next step in Google trying to put the screws to Sonos and Sonos trying to abandon Google Assistant?