The solution "unfreezeInput" did not work for all cases in my context. I had a function to remove html entities that created a textarea dynamically, put the html encoded data into, and destroyed it after extracting the decoded value. This had an impact on chrome autocomplete that freezed all the fields it had filled, I took time to figure out it came from this particular function. I replaced the textarea created in this function by a div, and extracted the decoded value with .textContent property in the div.

Then it seems this bug disappeared forever.

So it seems Chrome has a bug, when new form fields are added dynamically while Chrome autocompletes.