Hi @fixitmania53,
First of all, Apple released Audio Unit support quite a while ago, which offers much more flexible options in use, and can be seen as the successor of the Inter-App Audio format.
The IAA format comes with many limitations, which we’ve tried to summarize in our Limitations of Inter-App Audio article.
Please give the following steps a try, to see if it helps to resolve the problems:
(1) Load the “New Project” project template
(2) Close all running apps, including Cubasis
(3) Fully shut down the iPad
Does this help to resolve the current problems?
Best wishes,
Lars