I really need to find an addon to automate this.
As the template you deleted says:
Be sure to read the following link for how to gather logs.
https://support.symfonik.app/t/how-to-gather-logs/18
Any issue without the logs can be automatically closed without any further notice.
Please provide the necessary mandatory logs?
A probable cause is that you have a scrobbler also installed on the phone and Symfonium broadcast the necessary information too as supposed, something plexamp does not do by default IIRC.