Drop shadow angle not preserved when editing layer style for multiple frames

I have a Photoshop project with a static object that is present in every frame on the timeline. I'm trying to add a drop shadow to it by

1. selecting the layer
2. selecting the first frame
3. shift-clicking the last frame to select all frames
4. editing the layer style

I add two drop shadows to the layer, both at 135 degrees. When I select other frames, the drop shadows are both at 90 degrees (default). I have too many frames in my project to manually paste the layer style on every frame. How can I fix this issue?

Here's a screen recording of my issue: https://my.mixtape.moe/rogdav.mp4