Messages are saved twice

[MarinManuel]

I noticed that messages, whether text entered by hand in the text box on the lower right of the GUI, or broadcast messages send via the HTTP server are saved twice in the file.

In this example, I typed "test", then "test 2" in the message box and clicked save (once)

[medengineer]

Confirmed this occurs when a Record Node is downstream from a merger. Working on a fix.