Note: using npm start it works fine so I am not sure if it appends after upgrade to dfx 0.11.1
If I reload many times, it continues and crashes on other resources. If I use the application with action that not reload the application it works.
I have no log error on replica this appends with different browsers and I also inactive security feature of the browser.
Your last question suggested another test. I have another application based on the same technology. The problem is the same, it was working normally a few days ago and it works on the ic network.
This suggests that I should think about a change of the configuration of my machine.