diff --git a/Dalamud/Interface/GameFonts/GameFontManager.cs b/Dalamud/Interface/GameFonts/GameFontManager.cs
index 48a1f7271..a7cd27b83 100644
--- a/Dalamud/Interface/GameFonts/GameFontManager.cs
+++ b/Dalamud/Interface/GameFonts/GameFontManager.cs
@@ -169,7 +169,7 @@ internal class GameFontManager : IServiceType
         }
 
         if (rebuildLookupTable && fontPtr.Glyphs.Size > 0)
-            fontPtr.BuildLookupTable();
+            fontPtr.BuildLookupTableNonstandard();
     }
 
     /// <summary>
diff --git a/Dalamud/Interface/Internal/InterfaceManager.cs b/Dalamud/Interface/Internal/InterfaceManager.cs
index 72b3bd6c8..d5394fe8d 100644
--- a/Dalamud/Interface/Internal/InterfaceManager.cs
+++ b/Dalamud/Interface/Internal/InterfaceManager.cs
@@ -1028,7 +1028,7 @@ internal class InterfaceManager : IDisposable, IServiceType
                 if (font.FindGlyphNoFallback(Fallback1Codepoint).NativePtr != null)
                     font.FallbackChar = Fallback1Codepoint;
 
-                font.BuildLookupTable();
+                font.BuildLookupTableNonstandard();
             }
 
             Log.Verbose("[FONT] Invoke OnAfterBuildFonts");
diff --git a/Dalamud/Interface/Utility/ImGuiHelpers.cs b/Dalamud/Interface/Utility/ImGuiHelpers.cs
index dbb873edf..010178b26 100644
--- a/Dalamud/Interface/Utility/ImGuiHelpers.cs
+++ b/Dalamud/Interface/Utility/ImGuiHelpers.cs
@@ -240,7 +240,25 @@ public static class ImGuiHelpers
         }
 
         if (rebuildLookupTable && target.Value!.Glyphs.Size > 0)
-            target.Value!.BuildLookupTable();
+            target.Value!.BuildLookupTableNonstandard();
+    }
+
+    /// <summary>
+    /// Call ImFont::BuildLookupTable, after attempting to fulfill some preconditions.
+    /// </summary>
+    /// <param name="font">The font.</param>
+    public static unsafe void BuildLookupTableNonstandard(this ImFontPtr font)
+    {
+        // ImGui resolves ' ' with FindGlyph, which uses FallbackGlyph.
+        // FallbackGlyph is resolved after resolving ' '.
+        // On the first call of BuildLookupTable, called from BuildFonts, FallbackGlyph is set to null,
+        // making FindGlyph return nullptr.
+        // On our secondary calls of BuildLookupTable, FallbackGlyph is set to some value that is not null,
+        // making ImGui attempt to treat whatever was there as a ' '.
+        // This may cause random glyphs to be sized randomly, if not an access violation exception.
+        font.NativePtr->FallbackGlyph = null;
+
+        font.BuildLookupTable();
     }
 
     /// <summary>