Forum Discussion
Power BI Custom Visuals - shared reports issues
My guess is that the fix they rolled out was for formatting not being preserved in custom visuals when published. This is an issue we've run into as well. The "workaround" is to have every user 'Personalize' the content pack, open the report in the editing pane, add the custom visual using the ellipsis button in the visualizations pane, save their personalized copy of the report and then assign the custom visual to the currently non-functioning report. We opted to not utilize custom visuals.
Make sure you submit this as a bug report, as well. You can do so in PBI Desktop by using the 'Send a frown' option in the File menu, and using the feedback menu in PBI Service.
The forums are a great avenue for discussing issues, sharing thoughts / ideas, and troubleshooting, but they are not the official medium to submit bug reports.
Proper bug reports will receive more attention from the devs than forum posts.