After a while (seems like when I have issued a lot of Assistant commands to my Google Mini), it stops speaking when I use the openHAB 2.4.0 say command.
To fix this, I have to change the volume to something else and back, essentially doing this before a say command (my standard volume is 50):
HomeMini_Volume.sendCommand(51)
HomeMini_Volume.sendCommand(50)
BTW, the volume was displayed as 50 in PaperUI when it happened, so it is not that the volume was 0 or something.
I am doing this now before each say command, but the downside is, that it always does a “blob” sound.
Anyone else seeing this and maybe have another/better fix?