Update split-tunnels.mdx (#16403)

Author: ranbel

src/content/docs/cloudflare-one/connections/connect-devices/warp/configure-warp/route-traffic/split-tunnels.mdx

@@ -18,7 +18,7 @@ Split Tunnels only impacts the flow of IP traffic. DNS requests are still resolv
 
 :::
 
-Changes made to your Split Tunnel configuration are immediately propagated to clients. Because Split Tunnels controls what Gateway has visibility on at the network level, we recommend testing all changes before rolling out updates to end users.
+Because Split Tunnels controls what Gateway has visibility on at the network level, we recommend testing all changes before rolling out updates to end users. It may take up to 24 hours for changes to propagate to clients, depending on how many devices are connected to your organization.
 
 ## Change Split Tunnels mode