We are currently facing an issue with filled map in IE 11. Countries do not show any data, even though there are responses for each country. Chrome is working as expected.
It works well for me. You may try the latest version of Power BI Desktop and upgrade IE.
Yes we have the latest IE and Power BI Desktop. This issue doesn't appear to happen when our reports are hosted on a Power BI Embedded server, but does still occur using the public host.