another hotfix for post, similar issue

core.lua

@@ -1,4 +1,4 @@
-AuxVersion = '2.3.0'
+AuxVersion = '2.3.1'
 AuxAuthors = 'shirsig; Zerf; Zirco (Auctionator); Nimeral (Auctionator backport)'
 
 local lastRightClickAction = GetTime()

post_frame.lua

@@ -356,8 +356,9 @@ function private.post_auctions()
                 local charge_class = auction.charges or 0
                 auction.availability[charge_class] = auction.availability[charge_class] - (posted * (auction.charges and 1 or stack_size))
 
-                refresh = true
+                selected_item = nil
                 private.update_recommendation()
+                refresh = true
 			end
 		)
 	end