That doesn’t work for me - I have the same issue in 8.0.3 as I do in 8.5 - are you sure that works 100% of the time for you, and that it wasn’t a coincidence?
I’ve found this problem has been increasingly bad recently - clearly just bad luck - I’ve had to revert to using 7.5 on a number of sessions this week, and one project was one where on my client’s system (running 8.0.1) it was fine (as expected), but as soon as the project was opened on my system (either in 8.5 or 8.0.3) then many of the tracks had no output. Opening the project in 7.5 worked fine, as did putting it back on his 8.0.1 system once I’d finished editing it.
I’ve uninstalled 8 and will be reinstalling and only updating to 8.0.1 and see if that helps; I like the improvements of 8 over 7.5, so hopefully it will get better.
I’m a bit surprised that no-one else has confirmed the issue exists on the report I put up, though… I wonder if this issue is going to be taken seriously?