I found that Bitwarden needs orbot running as vpn to add new item to it or autofill. But you can  open and copy passwords without orbot in vpn mode. 

All the other apps and connectivity back to Start9 onion services that I use on my phone seem to work fine with orbot not as a vpn but on in background. Play around with Orbot in power user mode. 

I now am waiting for Stsrt9 clearnet to obsolve the Bitwarden autofill without orbot vpn behind Mullvad.