Data connection fluctuating from sim 1 to sim 2

[Looniya]

Hello there. From last 5 days my data connection automatically fluctuates. I'm using data in my sim 1 port and for less then a second it also shows data receiving from sim 2 as well (simultaneously). I have problem in playing games like pubg. Due to this the ping goes higher for few seconds (maybe till connection recovery). I have written to the feedback to MI. But i don't think they gonna respond it.