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VuforiaBehaviour.Instance.enabled = true doesn't automatically reinitialize trackers

I'm trying to re-initialize vuforia using VuforiaBehaviour.Instance.enabled = true as has been suggested. However, on doing so it doesn't seem to automatically reinitialize everything else like trackers/smart terrain/etc.

Also, the callback registered using VuforiaARController.Instance.RegisterVuforiaStartedCallback doesn't fire on re-initialization either.

How am I supposed to properly reinitialise the vuforia and all its components?

I have a similar issue, as after I do a disable/re-enable the targets are not recognised anymore. I need to take some pictures with the Hololens in the same scene between target recognitions.
I tried both
VuforiaBehaviour.Instance.enabled=false;
...