Then you should probably try reinstalling the game or your operating system if that's not fixed and it really bothers you. The problem happening only on SAMP means its probably game related, even though it's hard to understand why you would disconnect because of a game error - but I can't see any other explanation to why this would ONLY be happening at SAMP and you wouldn't even delay on other games.
If you have already reinstalled your SAMP and the OS, it's 99% because if your network, could be packet loss or many more things.