I've been observing the log "socket.send() raised exception." very often lately while using otree devserver to test my app. I have shortened the code below. It also happens with the attached code, which is very rudimentary. Unfortunately, I don't know if it's caused by the server or the client? Does it perhaps happen when the video tag is affected and, for example, the browser is moved or resized?

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HTML:

{{ extends 'global/Page.html' }} {{ block title }}Movies{{ endblock }} {{block
content }}

<video id="video-player" width="800" oncontextmenu="return false;">
  <source src="{{ static 'movies/movie01.mp4' }}" type="video/mp4" />
  Your browser does not support the video tag.
</video>

<input type="button" id="ready-button" value="Ready" onclick="handleClick()"/>

<script>
    function handleClick() {
        liveSend("hello from client");
    }
    </script>

{{ endblock }}

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Python:

def live_page_interaction(player: Player, data):
    print("received a message:", data)

class MoviePlayer(Page):
    form_model = "player"
    live_method = "live_page_interaction"

page_sequence = [MoviePlayer]