ue5 mesh distancefield

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In the mesh distancefield observation mode of ue5, it is found that the object will suddenly disappear or appear with the distance, which should be the embodiment of the object distance field. However, this situation affects the effect of flickering and flickering on two objects that are relatively close to each other in the picture after the video animation is rendered (like a breathing lamp), and in the reflective object, the picture in the reflection skips frames (because The phenomenon that objects in the distance factory suddenly disappear, or are affected by the screen space). I would like to ask God, can you explain these problems in a simple way, and then some solutions should be like, thank you very much!