A sustain pedal activating other one. [SOLVED]

[varol]

I have a setup contains 2 1 yamaha mx49 and one korg microkeys

 

On layout window they assigned to each keyboard and they seem to work ok.

But on edit and perform screen yamaha's sustain pedal sometimes activates korg's sustain. It's visible on graphical interface and works as sustain too.

 

 

 

I have used this setup with mainstage without problems (mojave, and mainstage 3.5.2)

 

Now using with Catalina and 3.5.3 this problem occurs.

[varol]

The midi thru option on both sustains set automatic, I've set each sustain to their keyboards manually. That seem to solved it. Strange I've never got a problem like that with almost same setup.