Juno-6 Arpeggiator problem

Hi! My juno-6 is doing some funny business when doing the following:

If I play a four note chord on the upper register of the keyboard with the arpeggio on the “down” setting it does a turn, instead of just going down it does the first note, then a note above the first one and then it goes down.

I noticed in the arpeggiator circuitry that a printed trace on the board was scratched out and replaced with a resistor.

I am wondering if anyone has experienced this problem.