Dictation keyboard isn't working on airpods pro 2 microphone

Hi,

Sometimes my dictation keyboard doesn't work when my AirPods Pro (2nd gen) is connected but when I reset my AirPods and connected again on my Mac, it started to work, but sometimes dictation keyboard doesn't work when my AirPods Pro is connected and sometimes it does work it's annoying when it doesn't work and I have to change the dictation microphone to the Mac microphone because my AirPods always connected to the Mac when I'm using it. Can anyone suggest me a permanent solution?