\partial after \cadenzaOff

[Werner]

I got problems with \partial after \cadenzaOff, which is ignored for three of
four voices.
In the DOC i found:

The \partial command is intended to be used only at the beginning of a piece. If
you use it after the beginning, some odd warnings may occur. 

It could be good to put there an example like:
if 
\partial 8*3 
doesn't work, try
\set Timing.measurePosition = #(ly:make-moment -3 8)

W.