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OnTrackableStateChanged constantly called on iOS 11.4 / Extended tracking

By mitch on Tue, 09/04/2018 - 14:58

Hi there!

Just noticed that my image marker content is lagging heavily with iOS 11.4 and extended tracking/device tracker enabled.

Console shows that "OnTrackableStateChanged" is called a couple of times a second switching from EXTENDED_TRACKED to TRACKED and vice versa, even if you just hold still focusing the marker. Each time the callback is called, I get a nasty & heavy framedrop.

Has this reported elsewhere? Is there a fix?

With devices running iOS 11.2 I don't get these issues...

All the best,

Micha

System setup:

- Vuforia 7.2.23

- Unity 2018.2.2f1 +  2018.2.6f1

- XCode 9.4.1

Just tested this again with Vuforia SDK 7.1.35 - with iOS 11.4 I get a reduced framerate - but OnTrackableStateChanged is called correctly once.

Also, allthough the framerate is reduced, it is still smooth with no "hickups".