I have it happen all the time when I publish. I use edge the most, so that's usually where I notice it, firefox and chrome usually display correctly, if not, clearing the cache usually works. The two sites I work on the most are each on a different host, and it happens to both. Usually straightens out in about a day. Seems to be for me to have to do with using truetype fonts. I don't think I've had the issue with "websafe" fonts in the list. (happens with some xara widgets too.)