diff --git a/HealBot_Controller_Spells.lua b/HealBot_Controller_Spells.lua
index 8ee88cb..e84201d 100644
--- a/HealBot_Controller_Spells.lua
+++ b/HealBot_Controller_Spells.lua
@@ -627,7 +627,11 @@ end
 
 -- HealBot_RecalcHeals: Flags unit for visual refresh.
 function HealBot_RecalcHeals(unit)
-  HealBot_Action_Refresh(unit);
+  if unit then
+    HealBot_View_DirtyUnits[unit] = true;
+  else
+    HealBot_Action_Refresh();
+  end
 end
 
 -- HealBot_RecalcParty: Triggers group layout rebuild.
diff --git a/README.md b/README.md
index 30f3c00..a0a402c 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,7 @@ Default installation path: `C:\Program Files\World of Warcraft\Interface\AddOns\
 
 **v1.7.3**
 * **Performance Fix - Table Pooling Part 2** - Fixed remaining un-pooled table allocations in layout updates, macro parsing, nampower integration, and aura tracking by utilizing HealBot_GetTable().
+* **Performance Fix - HealComm Networking** - Fixed issue where incoming `HealComm` messages triggered synchronous UI redraws, causing massive lag in 40-man raids during combat. `HealBot_RecalcHeals` is now decoupled and deferred through the `HealBot_OnUpdate` dirty queue, allowing multiple network events to collapse into a single frame redraw.
 
 **v1.7.2**
 * **Performance Fix - Table Pooling** - Fixed massive Vanilla Lua 5.0 garbage collection memory leaks caused by unbounded table allocations in high-frequency update loops (e.g., `OnUpdate` and `PreserveStateByGUID`). Moved tables to file-local scope and implemented inline clearing.