There is a finite shared buffer for ALL debug messages (to keep memory usage to a sensible level and to keep the editor as responsive as possible)
I suspect your other debugs are simply exhausting this shared buffer.
It is good practice to disable debug nodes when you are not debugging - since they generate LOTS of websocket traffic and too many can have an adverse affect of performance of the editor.
To prove this to yourself, try disabling all other debug nodes.
In my opinion, unchecking debug nodes won't free the shared buffer.
For that, you need to disable the node by clicking on the small square right of the node :
I think unchecking the node in the "selected node" part will still load it, but will not display it. Whereas if the node is deactivated as shown above, nothing will be loaded.
This is just a hypothesis and if I'm wrong please don't hesitate to correct me. Thank you Steve .