Adding filter to TCP OSC


I'm trying to add a filter to my TCP OSC connection, but seem to be failing in having it implemented.. on Mac OS

I'm sending "/eos/filter/add=/eos/out/ping", but I am still receiving all other OSC output. I've confirmed Eos is seeing my filter addition in Diagnostics, but it doesn't seem to do anything. Any key press inside Eos still sends out packets to my client.

I normally send a subscribe command 500ms before, and so I've tried removing that and there's no difference.

I've read the other forums posts on the topic, and had a look at the SyncLib PDF, but nothing I do seems to change the outcome.

Any thoughts would be great. Thanks!