It's not bugs, its settings and host compatibility problems.
Changed my rating from one star to five.. Actually when working with this type of apps which are dependent to a host, I discovered that you have to make both ends meet, so their MIDI messages will sync or be compatible.. I was having problems with the MIDI notes not bending when played back on Cubasis, what I did was remove the Cubsis bend whell so it will not counter the bending of ifretless. Also the bend range of ifretless should be adjusted to your preference because I think their default send was narrow bends, so it sound alright on ifretless but when you listen to the host DAW its not the same. I think they should emphasize this in tutorials, or just create a really good default setup, still there are many kinds of DAWs with various attitudes. The past problems of "harmful to the ears pops" actually it was more of an explosion are now gone.. So thanks..