We have reports on the PBI service that are suppose to show tool tips on a matrix and when you hoover over a particular cell, the tool tip no longer appears. This appears to be a bug in the service. ...
Hi michaelm91
The display on the Desktop is not exactly tooltips in the sense that it will be updated accordingly. So if you want to use tooltips, it is recommended to turn on the relevant settings .
Best Regards,
Community Support Team _ Ailsa Tao