3 dotmatrix program isn't working well with hardware

[tballmsft]

Perhaps related to: https://github.com/microsoft/jacdac/issues/1335

https://makecode.microbit.org/_8Ut0jYYJxbHT

[tballmsft]

• not all three LED screens get toggled on each button press. This happens when HW connected or disconnected to dashboard/makecode
• sometimes, every other button press of A button is ignored

[tballmsft]

trace.jd.txt

[pelikhan]

what hardware is that?

[tballmsft]

https://microsoft.github.io/jacdac-docs/devices/microsoft-research/jmmatrix87v40/

[pelikhan]

@tballmsft please retest.