diff -up ./src/programs/pkttyagent.c.ori ./src/programs/pkttyagent.c
--- ./src/programs/pkttyagent.c.ori	2019-09-27 14:14:35.096310576 +0200
+++ ./src/programs/pkttyagent.c	2019-09-27 14:14:56.988586737 +0200
@@ -55,7 +55,7 @@ static void tty_handler(int signal)
 
   if (tty_flags_saved)
   {
-    tcsetattr (fileno (tty), TCSAFLUSH, &ts);
+    tcsetattr (fileno (tty), TCSADRAIN, &ts);
   }
 
   kill(getpid(), signal);