Exporting FBX from sequence not working in 4.13?

I seem to be unable to actually export keyframed animation from the sequencer in the preview. It creates a take that’s much shorter than the sequence range (I’ve seen it do both 30 and 49… not sure what’s determining this) without any keyframe data in it. I tried the simplest possible test case to see if the problem was in my project… I created a brand new project and added a cube to the default level. I then created a sequence, left the default range of 150 frames and animated the cube moving around. I did the export from the sequencer (selected export sequence) from the “General Options” menu in the sequencer and got the same reusult… the mesh exported but no animation.

I’m also seeing the same thing in UE4.20.0.