I have had a couple of instances where a response I have written to a post has not appeared on the screen - instead the response is replaced by "@null".
Does anyone know what is going on when this happens?
I too don't know what's that null mean,
I also experienced just now.
I am posting a comment to a discussion then suddenly appeared null.
Maybe the post removed.
I suppose that might happen if the poster changes their mind and deletes a post in the interim between it appearing and a response being posted - that's certainly worth a thought.