Google assistance not working on Waze when using iPhone

Hello wazer, I am currently using a new iPhone 12
i found that the Google assistant do not capture or react to my voice after ok, Google.

I am able to say Ok, Google and it detected it and bought out google assistant

however if I say anything after that, 4 out of 5 time ut is not going detect anything, if I keep trying it, may be I can get it working once in a while……

what ch is very annoying because I used to use Google assistant and voice to report incidents on Waze and I am no Ling able to do it now, anyone know if there is a fix for that other than use an android phone?