Concurrent Activities Diagram shows nothing but "The Threading log is empty"

I'm running PyCharm Pro's Concurrency Diagram for a python application which uses both threading and asyncio.

My dev environment runs under docker, and the debugger is correctly configured to work with docker.

When I run run PyCharms Concurrency Diagram the run window titled 'Concurrent Activities Diagram' just shows 'The Threading log is empty'.

The python application is clearly running based on looking at CPU utilization, but PyCharm doesn't seem to give me any way to interact with it, I don't see console output anywhere.

Incidentally the profiler does work on the same run configuration.