Version: 2.77 rc2 (linux 64bit)
How to reproduce:
# Open the attached file
# Render a frame in the "Main Sequence"
# Disable the "Globe Scene" strip and render again
# Note how the lower scene strip causes the one above it to disappear somehow
Not expected behaviour at all. "Use Sequence" is a very useful new feature, but the strips need to be able to blend with everything else in the Video Sequencer.