We use iframes for embedding, each of which loads the same icon font from the same domain. However, IE11 sometimes icons don't show up. They are properly loaded from the server (with same headers), but one iframe displays them and the other does not. This happens only occasionally. It's hard to see when (and why) it's happening... We've tried all the recommendations from the troubleshooting document (this chapter) but it did not solve this problem.
We use iframes for embedding, each of which loads the same icon font from the same domain. However, IE11 sometimes icons don't show up. They are properly loaded from the server (with same headers), but one iframe displays them and the other does not. This happens only occasionally. It's hard to see when (and why) it's happening... We've tried all the recommendations from the troubleshooting document (this chapter) but it did not solve this problem.