After import usd file to UE4 sequencer is missing some track

General Feedback & Requests
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Hi all, I’m using UE4.27 and exporting the usd file from blender, when I used USD Stage load the file was perfect.
Track 1 is Transform
Track 2 is UsdStageActor (using shape keying from blender)

Capture
Capture1494×921 193 KB

After Import to project the Track 2 is missing… oops, please help~~~

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Capture21223×633 63.2 KB