Missing/Broken GrandStaff

[address@hidden]

The following is a bug I noticed several versions ago (whatever 2.7 version
I moved to from 2.6), but neglected to bring it up because I was in my lull
phase of lilypond activity, measured as a sinusoidal curve. This message is
to identify whether other people have the problem; when I return to my
computer in a few hours, I will do my best to send a follup message with
code that reproduces the oddity.

I have a system with many, many instruments. I use
\RemoveEmptyStaffContext. Page 1 is OK, because all staves in the system
are forced to appear. With all pages after that: in instances where both
staves in a GrandStaff have no content other than R(m)*(n), the GrandStaff
either becomes invisible but leaves a massive gap or remains visible but
has nothing on it.

Again, code will follow. Just want to see if people have seen this before.

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