Cannot get a valid IDFA after turning "Personalized Ads" back on

I am testing AppTrackingTransparency framework. I was able to get a valid IDFA on an iOS 14 simulator by following steps in the doc.

When I turned off "Settings > Privacy > Apple Advertising > Personalized Ads", the IDFA became 0s, which is expected. However, after I turned "Personalized Ads" back on, I still got zeroed-out IDFA.

I tried several ways to reset the simulator, e.g. Device > Erase All Content and Settings…, but I cannot get it back to a working state. I cannot get a valid IDFA anymore.

Environment:
Xcode 12.0 beta (12A6159)
macOS Catalina 10.15.5
The same issues for me

Is anyone from apple answering this question? Hello, apple? This is a big deal. We're getting zeroed IDFAs even when we turn on the personalized ads.

Cannot get a valid IDFA after turning "Personalized Ads" back on
 
 
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