MATLAB: Command window refresh in R015b

duplicate postMATLABmatlab guimex

Dear all,
For our numerical software, we've coupled a C++ library with MATLAB. Every few seconds, that library has some useful output, that we send to the command window (mexPrintf).
We've come to rely on calling drawnow('update') after every print to make sure that the output of the library streams live, line-by-line, into the command window, instead of being buffered (appearing in chunks of a good number of lines at a time).
Now, a user of our software reports that this mechanism stopped working between R2015a, and R2015b. I've checked the release notes but could not find a clue that would explain this.
Any hints for me?
Best regards, Joris Gillis