Word Wrap disappearing when report published to Report Server

[Anonymous]

Created a report using PBI Desktop, and took about an hour to get the column headings right on this matrix, as I have three matrixes showing the same columns, but from different sources and can't find a way to make all of the headings the same size.  However, it looks ok, and most of the headings are wrapped.  

But when I publish this to my report server, the word wrap disappears.

Any suggestions gratefully received (mostly concerned about the word wrap not happening on the server)

EDIT***  Forgot to say in my original post that I have tried turning off column auto resize on the the report, made no diffierence.