Hex Stings -How are they handled on analog joins?

I have been creating an onkyo remote.
The onkyo loves sending Hex strings.
Was not sure why the regex worked for a short instant and then went crazy.
Created a serial join with the same regex and it all became clear; my
volume slider works when the numbers appear to be decimal then jumps to
Zero when the hex notattion ABCD appear.
I have ticked and unticked every hex and none hex option in GD. Any
pointers anyone? Where did Fiasco go?
Nahshon

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