From 8f3baeb1c9e72a8c080e167155c3437fd4904c06 Mon Sep 17 00:00:00 2001
From: Lukas Matena <lukasmatena@seznam.cz>
Date: Fri, 18 Dec 2020 11:14:26 +0100
Subject: [PATCH] Fix of #5410 (Ironing untick/tick bug) This is a follow-up of
 commit b1b7a5a which fixed several similar bugs

---
 src/libslic3r/PrintObject.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/libslic3r/PrintObject.cpp b/src/libslic3r/PrintObject.cpp
index 98be93b31f..203f24d6d0 100644
--- a/src/libslic3r/PrintObject.cpp
+++ b/src/libslic3r/PrintObject.cpp
@@ -655,6 +655,7 @@ bool PrintObject::invalidate_step(PrintObjectStep step)
     } else if (step == posPrepareInfill) {
         invalidated |= this->invalidate_steps({ posInfill, posIroning });
     } else if (step == posInfill) {
+        invalidated |= this->invalidate_steps({ posIroning });
         invalidated |= m_print->invalidate_steps({ psSkirt, psBrim });
     } else if (step == posSlice) {
 		invalidated |= this->invalidate_steps({ posPerimeters, posPrepareInfill, posInfill, posIroning, posSupportMaterial });