Shiny app closing on all browsers but explorer - r

I am currently working developing a shiny app that process a lot of heavy bayesian models. We are facing the following problem:
Our app suddenly closes if we try to run it in the rstudio browser or google chrome but apparently it is not a code problem since we can run the app on internet explorer, anyone had ever faced such issue?
source code: https://rstudio.cloud/project/413282
If we just run shiny::runApp() it opens a new window with the app, after 3 min (aprox) the new window closes but according to the console it is still running with no errors

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