Injection "__ob__" not found. Reflect.ownKeys !== Object.keys

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Version

2.4.2

Steps to reproduce

Not actually sure what is causing the object to be observed (__ob__ to be added); will try to create a minimal repro later.

Update: Repro link: https://jsfiddle.net/49gptnad/508/

What is expected?

For __ob__ to not be considered an injection.

What is actually happening?

As shown in the first screenshot, this seems to be happening because of the usage of Reflect.ownKeys(), which apparently does Object.getOwnPropertyNames(target).concat(Object.getOwnPropertySymbols(target)), which is returning non-enumerable keys.

[privatenumber]

Here's the reproduction link: https://jsfiddle.net/49gptnad/508/

__ob__ gets added because it's being added to a data().