Save as (either in file menu or ctrl+shift+s) to a different name (e.g. "testsavedas.wav").
Do some processing
Save with ctrl+s or the save button
The changes will be saved to the original "test.wav" file rather than "testsavedas.wav", thus overwriting an original file where one might expect that the new file name they saved to will have the new changes.
To reproduce:
The changes will be saved to the original "test.wav" file rather than "testsavedas.wav", thus overwriting an original file where one might expect that the new file name they saved to will have the new changes.