I have tracked this issue to openfl 3.1.2 specifically. When doing a simple check while dragging an object around the screen to detect if it leaves an area, I noticed the object was no longer updating its position (immediately after updating to openfl 3.1.2 from 3.1.1).
Further investigation shows that if myObj.width (or height) is called anywhere (even in a trace) that object fails to update its position. Refer to this simplified example.
//called every frame
myObj.x = mouseX; //update obj x coord to track mouse x
if( myObj.x - myObj.width < 0 ) //offscreen left
{ //do something }
Simply calling myObj.width (even inside a trace) causes myObj to fail to update its x position, so it stops dragging altogether if width is ever called on it.
PS - is there a bug database that would be more helpful to post these sorts of issues to?
UPDATE This topic has been moved to github issues https://github.com/openfl/openfl/issues/753
