[10.1.1.11] Not saved the file, after the cancellation noise reduction

How to repeat:

1. Remove the noise (Ctrl+Shift+P)

2. Save (Ctrl+S)

3. Cancel (Ctrl+Z)

4. Save (Ctrl+S) - changes have not survived, but pretended that all was preserved.

Version 2017.1.1 Build 10.1.1.11