Did you restore your keys on another device? Happened to me when moving from Android to iOS.
nostr:npub1xnf02f60r9v0e5kty33a404dm79zr7z2eepyrk5gsq3m7pwvsz2sazlpr5 !
I have the test version of the app in iOS
I am sure i didn't close the channel.
Don't know why it is force closed... 
Did you restore your keys on another device? Happened to me when moving from Android to iOS.
Definitely not