Niagara point cloud doesn't use entire animation range

Hey! I’m using an animated point cloud that has been imported into 2500-ish exr images and then imported into Unreal and rendered with Niagara. The Niagara system only plays about 120 frames before repeating.

The textures are external but Unreal is able to preview the entire range in the media player. I’ve tried to import them into Unreal to see if that helps but it only imports around 1000 frames and crashes Unreal if applied.

Thanks in advance for the help!