Limitation on number of models Vuforia Studio can use

Hi, I am currently working on a project which requires 6 different models imported from creo illustrate. I have successfully imported all the models and attached model targets and spatial targets on the models (view 1 has model target, view 2 has spatial target, view 3 has model target etc). I am also using those models on 2 different views each (view 1 has model-1, view 2 has model-1, view 3 has model-2, etc).

With that said, I am currently facing some issues where the model target would only work for 4 of the models but not the other 2 which are imported the at the latest timing. Where there is also a bit of a glitch when I enter the view with the not working model target, where there are notable amount of bright purple pixels that appears momentarily. 

The other 4 different views are all working just the 2 latest models are not. The models on the 2 views that are not functioning have also been tested on a different project. They are all fully functioning there but not on the combined project.

That being said, is there a maximum amount of models that can be imported to Vuforia Studio? Or is there a limited amount of model target that can be used within a single project?

Any help would be much appreciated!