Why there is coming weird resolution issue in Redmi Note 5 Pro?

Hello Everyone
I am currently my game on various android mobile phones.There is a weird problem coming in Redmi Note 5 Pro.Everything runs well in first start but after it when game is stopped and started again,resolution stretches and widget buttons change their size.FOV of player camera also changes.If the game is minimized and maximized again,Resolution corrects itself then everything runs well.
Please help me with this issue.I have already searched solution for this but in vein.

Its aspect ratio is 2:1.I think the issue is because of it.
Anyone who can help?


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