Trying to close the app on my iphone X - IMPOSSIBLE??

Trying to close this app on an iphone X sucks… it has always sucked… drag until a little line appears (maybe after 6 or 7 tries…) then swipe away. Now, new versions of IOS have done something and I cannot even get the little line to appear… it just shows an arrow that allows me to swipe to view other apps, but I can no longer swipe away or close Cubase IC Pro… It’s now ALWAYS running on my phone.

Please fix this. It’s annoying me severely.

Thanks,
Todd

I have an iPhone xs and I can close it down every time.