LMS takes all COU and becomes unresponsive

Hello,
Asking for help as to how I troubleshoot this.
When I play a radio stream, in particular LBC my LMS service ramps up to take all CPU and then it is unresponsive to changes like volume up/down.
It's running on a PI 4 and TOP shows 100% CPU.
How do I dig into what is consuming the CPU?
Thanks
Tom