disconnected from server shinyapps.io

Hello,
my web-app at [https://abbatidanilo.shinyapps.io/] keep on disconnecting with the message:
"disconnected from server".
I try to tune differently all the relevant parameters like suggested in [https://shiny.rstudio.com/articles/scaling-and-tuning.html] but invain.

The deployment seems to be correct as you can see in:
Preparing to deploy application...DONE
Uploading bundle for application: 2019379...DONE
Deploying bundle: 2942976 for application: 2019379 ...
Waiting for task: 709489596

  • building: Parsing manifest*
  • building: Building image: 3265682*
  • building: Installing system dependencies*
  • building: Fetching packages*
  • building: Installing packages*
  • building: Installing files*
  • building: Pushing image: 3265682*
  • deploying: Starting instances*
  • rollforward: Activating new instances*
  • terminating: Stopping old instances*
    Application successfully deployed to https://abbatidanilo.shinyapps.io/cytoChain/
    Deployment completed: https://abbatidanilo.shinyapps.io/cytoChain/

I do not see any message in the log file but I do see this message when browsing with Chrome:
DevTools failed to parse SourceMap: https://abbatidanilo.shinyapps.io/cytoChain/_w_947ddcea/shinydashboard-0.7.1/shinydashboard.min.js.map

I am experiencing exactly the same problem.

At the end I managed to deploy my web-app just deleting the old version and re-deploying it from Rstudio.
In general, even if there is the possibility to just update the web-app, I was never been able to perform the process: only deleting and re-deploying from scratch, and then re-inviting all my partners... really disappointing

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