Current listening / Big Finish continuing app woes

Current listening. Big Finish, but I still daren’t use their old iOS app to download new audios. Because it isn’t coping well with large (500+) libraries like mine (700 ish). I have lots of old audios already downloaded in it, and it works well for those. But it isn’t safe again yet for downloading new releases. They are not making a great job of fixing this problem. Tonight I am using the free BookPlayer app.