Firefox bug after reconnection (computer standby)

[Nikolastual]

Hello, I have a problem in production with socket.io and Firefox:
I connect to my application, connection to socket.io made, my computer goes to sleep and cuts the connection to the socket, so far it is normal, and when I woke up I got an error message in the Firefox console:

« The connection with wss://.....?EIO=... was interrupted during the loading of the page »

Where this error message can come from, present only on Firefox ?

Thanks