I'm using the Turkey server in PUN and some of my users are stuck in ConnectingToMasterServer state and they are disconnected very often but this doesn't happen on India and Singapore. How can I debug this issue?
Use the docs.
Here is a little list of things that help us help you.
Here is a list of things that can be checked in case of disconnects.
I think you also mailed us. Please don't double post! At least mention you posted somewhere else, too...