Add note about freezes on Win 11

Author: mphe

README.md

@@ -63,6 +63,14 @@ If the `debug/gdscript/warnings/exclude_addons` project setting is enabled, it w
   If the port is already in use, e.g. by the LS of another Godot instance, Godot is unable to start a new LS.
   Hence, this plugin is unable to connect to the correct Godot instance and report correct diagnostics in such cases.
 
+### Godot freezes in larger projects on Windows 11
+
+In larger projects, refreshing diagnostics or opening the diagnostic panel (which may trigger a refresh) can cause Godot to freeze on Windows 11.<br/>
+This seems to be a bug in Windows 11's [TCP window scaling](https://en.wikipedia.org/wiki/TCP_window_scale_option) implementation.
+
+The workaround is to enable `Use Thread` under `Editor settings -> Network -> Language server`.
+
+See also [#2](https://github.com/mphe/godot-diagnostic-list/issues/2).
 
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