Bug when disabling windows and getting entries values on macOS

How to reproduce:
- Create a window with entries
- Add a button that: disables the whole window and after prints the entries value
- Run this, enter something in entries, remove focus from these entries (by clicking around), click the button
- Values printed are empty

A way to workaround this is to get these values before disabling the window. Another workaround: get entries values, throw away the returned results, disable the whole window, and get again values.