Hidden files are hidden (reproducible)

Question

Specification:
OS: Ubuntu 16.04
Tor Browser Bundle: upgraded from 7.x to 8.0.3 (latest version)

Issue (summary):
FileChooser.show-hidden is set to false after save and open dialog is canceled or saved/opened. (this "registry" key determines whether or not hidden files are shown in Nautilus, the default file manager for Ubuntu)

Question:
How do I prevent TBB from setting org.gtk.Settings.FileChooser to false after save and open dialog is canceled or saved/opened?

Example:

$ gsettings get org.gtk.Settings.FileChooser show-hidden
> true

  - open tor browser
  - use control+o or control+s

  - Close the dialog (using 'x' in the corner OR save to a file OR open a file)

$ gsettings get org.gtk.Settings.FileChooser show-hidden
> false