Great question! A little bit of javascript will do this for you:

$(document).ready(function(){

// The #q7 is the id field of my input field, in your case any field that should trigger this action
//You can have multiple fields that trigger this too if you wish, for each section!
   $("#q7 input").change(function(){
    var field1 = $("#q7 input").val();
    
	if (field1 !== "") {
// My Section id is #q6 so you will change yours to fit what you need
      var element = document.getElementById("q6").getElementsByClassName("collapsible")[0];
      element.classList.remove("collapsible");
   }
     else {}
  });
  
});

Let me know if that works for you!