On testing this with Ubuntu 18.10 dev with unifont 1:11.0.01-1 I do not see this issue anymore on the flag at this site (the browser document, the tab title, the window title and the taskbar title are all fine). I also did test this on other sites with other characters where I did usually see this issue and I couldn't reproduce it there too.
** Changed in: unifont (Ubuntu) Status: New => Fix Released -- You received this bug notification because you are a member of Ubuntu Studio Bugs, which is subscribed to unifont in Ubuntu. Matching subscriptions: Ubuntu Studio Bugs https://bugs.launchpad.net/bugs/1489360 Title: 🏁 Spaces after some unicode characters are looking like unicode placeholder characters Status in unifont package in Ubuntu: Fix Released Bug description: I'm using Ubuntu 15.10 dev with unifont 1:8.0.01-1 and adding spaces after some unicode characters will cause them to look like unicode placeholder characters (a square with some characters in it). An example would be the 2 byte unicode character "D83C DFC1" which is drawn as a flag and looks this: 🏁 If I'm adding a space after the flag it looks this: 🏁 But it seems some browsers are drawing the space correctly but on system components the unicode placeholder character is shown. For this reason I have also added the flag and a space at the beginning of the summary to cause it to be shown in the title of the window manager. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unifont/+bug/1489360/+subscriptions -- Mailing list: https://launchpad.net/~ubuntustudio-bugs Post to : ubuntustudio-bugs@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntustudio-bugs More help : https://help.launchpad.net/ListHelp