Radio buttons gone?  Firefox user?  Here is an easy work-around.

If you are using the current version of FireFox (54) instead of the ESR version, you might experience radio button prompts that only partially render - the label text appears but the buttons themselves do not.  You can proceed as if the radio buttons were visible.  They still work.  You just cannot see them.  As always, it is ok to click on the label text (and this might feel a little less strange than clicking in the empty space).

Missing radio buttons (highlighted in yellow)

FireFox ESR, Chrome, MSIE 11, and Safari are not affected - radio buttons render properly.  To see what version of Firefox you are running, go to the help menu and select about Firefox.