diff --git a/SYSTEM_NOTES.md b/SYSTEM_NOTES.md
index c4eca5a6..14e2e299 100644
--- a/SYSTEM_NOTES.md
+++ b/SYSTEM_NOTES.md
@@ -17,4 +17,8 @@ Various restrictions and behaviors of myNode and the various applications are do
     echo 0 > /sys/bus/usb/devices/<coldcard device>/authorized
     echo 1 > /sys/bus/usb/devices/<coldcard device>/authorized
 - CKBunker uses a separate password that starts as "bolt" and can be updated within the app
-- The password is stored in plaintext on the myNode drive
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+- The password is stored in plaintext on the myNode drive
+
+## Sphinx Relay
+
+- Connection strings may only work a single time but are re-generated on each reboot. Since myNode does not know which string was used to successfully connect, they continue to be displayed in the UI, even though they may no longer be valid.
\ No newline at end of file