Thanks for the feedback. Oddly, I have two matrices that are pretty much identical and without any intervention from me, one of them just started doing the word wrap....... I will take your advice and see how I go!
You are not the only one who has this problem, It's also not working for me and I tried enabling the "auto width" for the Matrix, but it didn't solve the issue. Too bad it's still not fixed .
EDIT: Though I'm talking about values in rows, not the column headers.
I am facing this same problem. My auto-size and word wrap settings are enabled and I've saved over my report several times. Does anyone know of another way to solve this problem? Or might I expect for it to be resolved in an upcoming version of the Report Server? I'm really in a pickle here.
I have fixed the issue, but I don't want to post an answer as it is very unsatisfactory and I cannot replicate it at will. All I did was "play around" with the controls like autosizing column headings and word wrap on values, publish the report and one time it worked. Then I just used the format painter to copy the formatting to the other matrices I was having issues with.
I tried going back and repeating what I did on other reports, but I could not get it to work reliably.
Sorry I can't be of more help
It looks like the update (2018 March) solved the problem, likely it was a bug which got fixed.
What I noticed is that when I opened my reports with the updated desktop app, the "Word Wrap" was OFF, I set it to ON, uploaded it, and it worked.
I'm encountering a similar problem but with the Card visual. I have word wrap on in the desktop app but after publishing to services it gets turned off under format settings. Do anyone have a solution for this?