motion design the text become blurry when they move

[Anonymous_9d18aea4e280b98386ed78e04b0c7eaa (winton)]

I designed an animation using UE5’s Motion Design, but the subtitles become blurry when they move. Could it be a settings issue?

the demo video is here ：https://www.youtube.com/watch?v=Y-DVwT01naQ