diff -up ./src/programs/pkttyagent.c.ori ./src/programs/pkttyagent.c
--- ./src/programs/pkttyagent.c.ori	2019-09-27 16:52:24.377434038 +0200
+++ ./src/programs/pkttyagent.c	2019-09-27 16:53:01.743875350 +0200
@@ -56,7 +56,7 @@ static void tty_handler(int signal)
 
   if (tty_flags_saved)
   {
-    tcsetattr (fileno (tty), TCSAFLUSH, &ts);
+    tcsetattr (fileno (tty), TCSADRAIN, &ts);
   }
 
   kill(getpid(), signal);