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I have two OnePlus 7Pro devices, both running OOS 10.3.8 and both rooted.

On one of these devices, I can go to Settings=>System=>Developer options=>Standby apps, and in the resulting list of installed apps, I can successfully change the status of any app from "ACTIVE" to other values ("WORKING_SET", "FREQUENT", "RARE").

On the other device, when I go to Settings=>System=>Developer options=>Standby apps, I also see the list of installed apps, but all are showing as "ACTIVE", and when I try to change that status for any app, the status does not change, and it remains "ACTIVE". This unchangeability persists after reboots.

I have been trying to deal with doze-related issues on the second device, and I'm guessing that one of the many things I was experimenting with might have caused AppStandbyBucket values to become unmodifiable. What could I have done on this second device to prevent the Standby-app status from being changeable? ... and what can I do on that device to enable those status values to be changed?

Thank you in advance for any thoughts and suggestions.

PS: I'm wondering if there might be some config file somewhere on the device which should be writable, but whose permissions might have gotten changed to read-only. Is that possible? If so, what could be the file (or files) in question?

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I have no idea what the exact cause of this problem was, but I fixed it by doing a nandroid restore from a recent backup (via TWRP).

Apparently, one or more files got hosed on my device from all my fooling around with doze management. The restore must have reset them back to a proper state.

Now, all the App Standby Buckets are functioning normally again.

All's well that ends well.

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