A very,very small issue: when first activating "Hide StatusBar completely" (in options > display options) and then de-activating it, the statusbar re-appears without expanding the FARR window accordingly. So the status bar partly covers the last match in the list. If no match is displayed, like when the inputbox is empty, then the statusbar party covers the input box. Restarting FARR solves the issue.
Something similar seems to happen when horizontal scroll bars appear - they also "steal" windowspace from the match list (concealing parts of the last match) instead of expanding the FARR window to accommodate them.