[BUG][NOWEB] - Different behaviour in NOWEB and WEBJS

[ldubrois]

Describe the bug

I was using WEBJS as engine.

To mark the message as seen I was always providing the Participant value even in the 1 to 1 conversation. It was working well.

I moved to NOWEB engine, and now the mark does nothing. I found that I have to set null to Participant in this case to make the mark seen to work.

Version

  "version": "2024.7.7",
  "engine": "NOWEB",
  "tier": "PLUS",
  "browser": "/usr/bin/chromium"
}

To Reproduce Steps to reproduce the behavior:

Try to mark a message as seen in a chat and providing the Participant using the From value of the payload.

Expected behavior

The API should beahve the same, no matter the engine (NOWEB or WEBJS)

Engine I'm using NOWEB engine.