Wrap lines in markdown output

I am having trouble making output in from markdown cells to wrap lines. I have Anaconda3 installation of jupyter lab on windows. I went through steps recommended in several places, i.e. python - How to wrap code/text in Jupyter notebooks - Stack Overflow
Which consist of setting up json files in nbconfig subdirectories in both of my config directories that live in
C:\Users\myname.jupyter\nbconfig\notebook.json
and
C:\Users\myname\Anaconda3\etc\jupyter\nbconfig\notebook.json
putting in them
{
“MarkdownCell”: {
“cm_config”: {
“lineWrapping”: true
}
},
“CodeCell”: {
“cm_config”: {
“lineWrapping”: true
}
},
“load_extensions”: {
“jupyter-js-widgets/extension”: true
}
}
This is all set and in text mode editor wraps lines just fine. However after markdown cell is run, output text runs over the boundary of the jupyter window and doesn’t wrap lines with resizing. Could anyone help with that?