Speaker with 3.73.415414 version not working in group

[clementg20]

Hi,

I've 6 speakers in the same unique group. 2 HK Citation with 1.56.310669 version of the cast software, 1 LG Soundbar with 1.52.272222 and 3 old Google Home Mini with now 3.73.415414.

2 of my 3 Google Home Mini was in the preview program, when the 3.73.415414 was push, they no longer work in the group while others speakers still work.

When the 3.73.415414 was push in production, my last Google Home Mini got the same behaviour : when I start to play music (with Spotify App or a direct URL with Home Assistant integration) the Google Home Mini don't do anything and stay idle.

I tried a complete reset of one of the Google Home Mini or a restart of the router without success. 

Thanks for your help

[NobodyUKnow]

415414 seems to have my Google Home (and minis) just letting me know "you're google home hasn't been set up yet" but it was working fine for years.  1st gen devices.