Incorrect master password according to configuration

Hi, I'm using Master Password v2.6-cli-3-0-ga85eff42 in older versions if I enter wrong master password i will get wrong generated password silently. In this version if I enter wrong master password I get this message:

Incorrect master password according to configuration:
  /Users/<<USERNAME>>/.mpw.d/<<NAME_HERE>>.mpsites.json: Master password doesn't match key ID.

This is an issue as I think. If someone will run password generator for some known website or service he will know when generated password is right. What do you think? May be there is a way to configure old behaviour?