When creating a 2D game, there is a flickering or 'rippling' effect on the sprite background as the character moves

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When creating a 2D game in UE4, if the background image is large, there will be a flickering or ‘rippling’ effect when the character is moving. If I open the project in UE5, this issue does not occur, but I am currently not ready to upgrade to UE5.
UE4中制作2D游戏，如果背景图片比较大，角色行走时会出现背景波动的情况，我把项目用UE5打开就不会产生这种情况，但目前还不想升到UE5，还有什么办法可以解决？