diff --git a/Known-issues.md b/Known-issues.md
index 699e665..cd3333f 100644
--- a/Known-issues.md
+++ b/Known-issues.md
@@ -380,6 +380,10 @@ Spicetools was never designed to provide support for games based on the Unity en
     * Some games won't boot into windowed mode.
     * Image resize and window resize options don't work.
     * Companion streaming doesn't work.
+ * Input:
+    * Most Unity games register for raw input for mouse, preventing spice's I/O stack from using raw mouse data.
+    * This is a Windows limitation (only one window handle can register for rawinput for a category of devices)
+    * As a result, in some Unity games, you cannot use the mouse wheel in the overlay, or bind mouse in Buttons / Analogs.
  * They seem to have a set of default debug key binds that always work; e.g., WASD for directional input. You'll need to map keys through spice that do not conflict with these, or use a controller.
  * In general, patches are not supported. Spice's patch system is built to make small modifications to small number of binaries. Most of the game logic is in managed code for Unity-based games, so the patches aren't trivial. Please look to binary replacements and third party tools for patching.
  * If you encounter a crash, check Windows Event Viewer. Spice can't capture the stack for managed code.