Problem with Local server when downloading

Hi Blynker Today i have a Problem that i know anout that:
I have a Local server on Raspberry pi 3B with Rasbian Full Update and some (5 Devices-MCU) so my Problem is When A computer that connected to My DSL Modem i have a very low bit rate on send and receive data between My server and My phone sometimes the command(Button or slider) commend does’t send to server and devices So i have so woory about this.
i configured just the Local server ip in all of setting part (no Isp ip).

This sounds like simple network congestion, or interference with your Local WiFI. Not sure how this is Blynk specific.

My Dsl Modem is LinkSys