Hello @denislavgavrilov ,

I find out that the issue is due to mongoose version and useUnifiedTopology in my mongoose dbConnect parameter.
that look like this now :

mongoose
    .connect(db, {
      useNewUrlParser: true,
      connectTimeoutMS: 60000,
      socketTimeoutMS: 60000,
      useCreateIndex: true,
      useUnifiedTopology: false,
      useFindAndModify: false,
      keepAlive: true,
    })
    ...

I can’t reproduce it quickly because the issue appears randomly every 2-3 days when the server is running so I’m waiting to see if this change (that give me new scary warning in console) fix the error.

Thanks