As you can see my error chart for July. The graph calls out that I am slightly below the 0.47% threshold.
But that's only because I have mediation in play and 17 advertising SDKs and analytics connected.
In those games with pure AdMob and analytics the indicators are even better.
I recommend to look at the report on errors, what kind of SDK causes them and try to catch them on your test device and look at the logs.
I understand you the increase in errors is very unpleasant and affects organic installations, so I always implement a new version gradually and look at the number of errors.