I am using ESP.getSketchMD5() to manage software releases.

I have noticed that if I use the same Arduino IDE, but in a different place in the filesystem the sketch MD5 is different.

I have used a portable version of the IDE to be sure that the same files are used.
For example loading a sketch that prints MD5 shows this behaviour.

Is this a known thing?

void setup() {
  Serial.begin(115200);
  Serial.println();
  Serial.println( ESP.getSketchMD5());
}
void loop() {
}