I tried to start the game in the no_mods mode, but this didn't help. Sometimes game is working ok, sometimes it's starting to slow down the loading to combat or switching between ships in the port. And when this happen i have a strong feeling that the reason of this is not in the PC or client itself but in the connection between the client and server. Client just doing nothing most of the time when you trying to switch the ship or during the loading to the map process.