`volatile float` serialized as `int`

Created by: aleshark87

With the last update of the library, i get floats variable serialized as ints variable. I'm using a ESP32.

This is the code you need:

volatile float distance;
volatile int state;

StaticJsonDocument<128> doc;

   doc["type"] = "data";
   doc["state"] = state;
   Serial.println(distance);
   doc["distance"] = distance;
   serializeJson(doc, msg);
   doc.clear();
   Serial.println(msg);

From the prints i get: 5.74 {"type":"data","state":2,"distance":5}

I don't get this issue using a non volatile variable. Bye