[O] Column width cookies stopped working in 9.2.3?

[Neil Jerram]

Hi,

I have tables with width cookies like this:

| <16>             | <6>   | <64>                              |

I just added new information to one of those tables, and the table
shrank down to match the size of the content, i.e. as though Org is
now ignoring the width cookies.

I believe I've also upgraded in the last few days, and now have:
Org mode version 9.2.3 (9.2.3-13-g727c3f-elpa @
/home/neil/.emacs.d/elpa/org-20190506/)

Is this a known thing?  Do I need something else now to make those
width cookies work?

Thanks,
   Neil