I'm having the same issue as well.
It's nothing we were doing because Logic 10.7 was just released today and Logic 10.6.3 was showing 8 inputs but without recompiling my code, in Logic 10.7 there's only 1 input now.
I posted it over at the LogicProHelp.com website.
https://www.logicprohelp.com/forum/viewtopic.php?f=1&t=160150&start=20#p841024
gabegarza1021
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@nikoliziapps do you have sample code that shows how you are doing this