Android doesn’t have the same feature set. Comparing the two like this is an obvious fallacy. For example, Apple does their ML e.g. for photos on device for privacy reasons, whereas Google does it in the cloud.

I’m not saying ML is the cause although it could be. I’m saying they are different products with different values, so expecting them to behave the same doesn’t make sense.

And yes, some background processing after an update is more than acceptable. It’s desirable if it means sending less data to Google.