MIDI Keyboard sound issues

[Pat0402]

I'm a new Pro Tools user so apologies if I'm missing something obvious.

I'm on windows using pro tools 12.

I have a Akai MPK Mini Mk2 Keyboard connected via USB, It is recognised as a midi controller.

Sound is output through integrated sound/ pc speakers

I create a basic instrument track
I hit the record button on the track (not actually recording just prepping the track to record) .
All the midi sound is distorted/unresponsive/just not right.

The strange thing is, as soon as I hit the play button and while recording everything is responsive and sounds fine...
I have the same issue across sessions but subsequent sessions I have selected the "use most recent io" check box or whatever it's called.

Any ideas what could be causing the issues?

Thanks in advance