HELP PLEASE - My SOLO button lights on its own while mixing!

[DocFingers]

HELP Please --- Oasys 88 - Playing back a mix of 7 MIDI tracks and the SOLO button for track 5 lights up on its own half way through the song, cuts out all the other recorded tracks, stays lit for a few measures as track 5 continues to play, and then turns off on its own wherein the other instruments begin playing again.
WHO (what Entity?) is pressing that button on and off during playback?
How do I make sure it stays OFF during playback?
Frustrating !!!

[Geoff Flynn]

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