Have Server 1 and Server 2, with Server 1 set as Startup.

Switch to Server 2 and choose exit from the back button menu, start nzb360 again and when it restarts it will show Server 1 with my chosen Startup Service displayed, but the left slide-out menu will show the services of Server 2 (although the name displayed will be that of Server 1), and using the volume rocker switches to the services of Server 2, rather than those expected from Server 1.

Same results if back button menu is disabled.

App: 11.1.8
Android: 7.1.2 / API 25 / LineageOS : lineage-14.1-20180117-harpia