Hide the tooltip if the unit doesn't exist. I thought this would fix that empty tooltip bug, but apparently it doesn't.

diff --git a/StarTip.lua b/StarTip.lua
index a915f91..79a8892 100644
--- a/StarTip.lua
+++ b/StarTip.lua
@@ -637,7 +637,7 @@ function StarTip.OnTooltipSetUnit(...)
 		end
 	end

-	if not UnitExists(StarTip.unit) then return end
+	if not UnitExists(StarTip.unit) then GameTooltip:Hide(); return end

 	if not StarTip.justSetUnit then
 		for k, v in StarTip:IterateModules() do