diff --git a/wx/lib/agw/customtreectrl.py b/wx/lib/agw/customtreectrl.py
index 81c48c45..d10a0182 100644
--- a/wx/lib/agw/customtreectrl.py
+++ b/wx/lib/agw/customtreectrl.py
@@ -6824,10 +6824,11 @@ class CustomTreeCtrl(wx.ScrolledWindow):
                 # Rightmost alignment of windows
                 wndx = w - item.GetWindowSize().x - 2 + xa
 
+            if wnd.GetPosition() != (wndx, ya):
+                wnd.Move(wndx, ya, flags=wx.SIZE_ALLOW_MINUS_ONE)
+            # Force window visible after any position changes were made.
             if not wnd.IsShown():
                 wnd.Show()
-            if wnd.GetPosition() != (wndx, ya):
-                wnd.SetPosition((wndx, ya))
 
         if separator:
             oldPen = dc.GetPen()
diff --git a/wx/lib/agw/hypertreelist.py b/wx/lib/agw/hypertreelist.py
index f96fca98..6adaf4ad 100644
--- a/wx/lib/agw/hypertreelist.py
+++ b/wx/lib/agw/hypertreelist.py
@@ -3052,10 +3052,11 @@ class TreeListMainWindow(CustomTreeCtrl):
                 if item.GetHeight() > item.GetWindowSize(i)[1]:
                     ya += (item.GetHeight() - item.GetWindowSize(i)[1])//2
 
+                if wnd.GetPosition() != (wndx, ya):
+                    wnd.Move(wndx, ya, flags=wx.SIZE_ALLOW_MINUS_ONE)
+                # Force window visible after any position changes were made.
                 if not wnd.IsShown():
                     wnd.Show()
-                if wnd.GetPosition() != (wndx, ya):
-                    wnd.SetPosition((wndx, ya))
 
             x_colstart += col_w
             dc.DestroyClippingRegion()