diff --git a/Half-Life.md b/Half-Life.md
index 422940d..d8b2e57 100644
--- a/Half-Life.md
+++ b/Half-Life.md
@@ -71,6 +71,12 @@ VGUI has plenty of documented memory leaks which especially affect Team Fortress
 
 # 2/3 Other pressing issues
 
+## GameUI: No check when returning back to Singleplayer from multiplayer
+
+Multiplayer changes the player speed (and possibly other CVars) that do not get reset when a Singleplayer game is loaded after a Multiplayer game was started.
+
+This is a check needed in GameUI. This was not something that impacted the disc release of Half-Life as the menu would restart the engine when going between SP and MP. GameUI doesn't restart the engine, so it has no chance to reset all of the CVars.
+
 ## Engine: Mapcycle woes
 
 Stop sending WHOLE mapcycle.txt in svc_serverinfo message. It easily overflows the buffer and is **not** used on client side. It's fine to send empty string, so it doesn't break protocol.