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diff --git a/DEVELOP.md b/DEVELOP.md
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+++ b/DEVELOP.md
@@ -93,6 +93,7 @@ written in NodeJS and Go
 [Jitsi Videobridge](https://jitsi.org/jitsi-videobridge/)
 XMPP SFU
 written in Java
+seems to require "plan B" SDP: https://github.com/jitsi/jitsi-meet/issues/4758
 
 [Jigasi](https://jitsi.org/jitsi-meet/)
 WebRTC bridge to Jitsi Videobridge