I changed sanders patch to fix the ff issue to be simplier, though it needs testing if this really fixes the issue

event.c

@@ -177,9 +177,8 @@ configurerequest(XEvent *e) {
 			configure(c);
 		XSync(dpy, False);
 		if(c->isfloat) {
+			if(isvisible(c))
 				resize(c, False, TopLeft);
-			if(!isvisible(c))
-				ban(c);
 		}
 		else
 			arrange(NULL);