UE4.27, After iPhone Mobile Msaa is enabled, the display of translucent materials fails after PostProcessVolume is added

When anti-aliasing is enabled to optimize the aliasing effect, but when Mobile MSAA is enabled it causes some abnormal effects

BadCase: If add post process volume and enable exposure, set min brightness and max brightness, this material will unnormal(other anti-aliasing TAA/FXAA switches will not affect)
translucent material & mobilemsaa & exposure

Is there a way to fix this?