If I Search in Network tab for some port number, let say 9000, then if there is a result and I right click it and choose "Go to Process" it will change to the Processes tab but the Search term (in the example 9000) would still be applied to the result list and so most often no relevant process would be shown (unless it got 9000 in its name/details ofcourse).
I think that clearing the Search term after clicking "Go to Process" can solve this but I'm not sure.