Need help

Hi, I am in the process of editing music I composed and recorded last year and I have an issue with using the left/right speaker nobs with most of my MIDI instruments. ​ Most of my MIDI instrument recordings are MIDI files exported from sheet music from a program called MuseScore. ​ For MIDI tracks I record directly onto LogicProX, I can use their left/right speaker nobs without them going back to default when I click away, which isn't the case when I use MIDI recordings that are MIDI files exported from another program.

I don't want to have to bounce all of those MIDI tracks into MP3s as there is quite a lot and I would rather save myself time if possible. ​ Is there any way I can use the​ left/right speaker nobs for MIDI recordings that aren't directly recorded onto the program without them going back to the default setting when I click away.

I hope everything makes sense.