diff --git a/src/coreclr/gc/gc.cpp b/src/coreclr/gc/gc.cpp
index 2bf3268a2c7a9a..e082b24b456021 100644
--- a/src/coreclr/gc/gc.cpp
+++ b/src/coreclr/gc/gc.cpp
@@ -44531,8 +44531,6 @@ Object * GCHeap::NextObj (Object * object)
 #else
     unsigned int g = hp->object_gennum ((uint8_t*)object);
 #endif
-    if ((g == 0) && hp->settings.demotion)
-        return NULL;//could be racing with another core allocating.
     int align_const = get_alignment_constant (!large_object_p);
     uint8_t* nextobj = o + Align (size (o), align_const);
     if (nextobj <= o) // either overflow or 0 sized object.
diff --git a/src/coreclr/vm/object.cpp b/src/coreclr/vm/object.cpp
index be228446be88bb..0e1bf133986c44 100644
--- a/src/coreclr/vm/object.cpp
+++ b/src/coreclr/vm/object.cpp
@@ -572,6 +572,7 @@ VOID Object::ValidateInner(BOOL bDeep, BOOL bVerifyNextHeader, BOOL bVerifySyncB
         {
             Object * nextObj = GCHeapUtilities::GetGCHeap ()->NextObj (this);
             if ((nextObj != NULL) &&
+                (nextObj->GetGCSafeMethodTable() != nullptr) &&
                 (nextObj->GetGCSafeMethodTable() != g_pFreeObjectMethodTable))
             {
                 // we need a read barrier here - to make sure we read the object header _after_
diff --git a/src/coreclr/vm/syncblk.cpp b/src/coreclr/vm/syncblk.cpp
index 5b0a5ed6647c7c..36176c3c11594a 100644
--- a/src/coreclr/vm/syncblk.cpp
+++ b/src/coreclr/vm/syncblk.cpp
@@ -2950,8 +2950,7 @@ void ObjHeader::IllegalAlignPad()
     WRAPPER_NO_CONTRACT;
 #ifdef LOGGING
     void** object = ((void**) this) + 1;
-    LogSpewAlways("\n\n******** Illegal ObjHeader m_alignpad not 0, object" FMT_ADDR "\n\n",
-                  DBG_ADDR(object));
+    STRESS_LOG1(LF_ASSERT, LL_ALWAYS, "\n\n******** Illegal ObjHeader m_alignpad not 0, m_alignpad value: %d\n", m_alignpad);
 #endif
     _ASSERTE(m_alignpad == 0);
 }