diff --git a/pkg/client/tunnel.go b/pkg/client/tunnel.go
index b8db98e..b40e407 100644
--- a/pkg/client/tunnel.go
+++ b/pkg/client/tunnel.go
@@ -134,6 +134,9 @@ func (t *Tunnel) Bridge(tapRead func(buf []byte) (int, error), tapWrite func(buf
 	}()
 
 	// TAP → Server
+	// Note: tapRead blocks on the TAP fd which doesn't support deadlines.
+	// On disconnect, this goroutine survives until the next TAP frame arrives,
+	// at which point WriteFrames fails on the closed connection and it exits.
 	go func() {
 		buf := make([]byte, 1600)
 		for {