because the 1.0.5 tram sim seems viable now, i have tried smething more than driving my 8 sandbox runs in the ULF A1. I drove Sandbox line 1 down south the Hauptbahnhof, opted to wait, got out, walked to the end of the ULF B1 tram, opened the end door and walked thru the tram, sat down , realized that my compartment door was still open, stood, stepped, clicked on that door, stepped back, sat, door closed. Great. First time out and about. But when i drove away, my tram had gone silent, either accelerating or braking, even though clattering over rail turnouts, the tram motors and brakes were gone silent. I went out in UI this time to the main menu, restarted the sandbox run, and, of course, all was back to normal. So that is an odd audio glitch.