please keep in mind that lib 5.0 is just for beta testing. the latest stable is 4.10
however, i’m sure the bug is somewhere in the server, not app nor lib.
you can do a simple test, to demonstrate the bug is not in code / hardware side:
turn off the hardware, and try to change the widget labels in the app. it will still instantly replace with the old label when you click the play button, no matter is the hardware is on or off.