@ccullers @heinzgruber For now you can use the "Send Feedback" function through the test flight app. This sends an email and provides all the necessary device information the developers will need in order to resolve (or credit!) your issue.
I received a link to give me access to the beta, and installed Apple testflight. But when I click on the link to spotify beta, it redirects me to the testflight app in the store, and if I open it, it says I have no access to any beta program. What's wrong ? Does the new spotify beta app is already available ?
I assume that it means that after that date no more beta updates will be issued and you'll go back to the regular release cycle. Don't think you'll have to re-download anything or that the app will be removed automatically.