TrackMate: problem with exporting particle overlay with a 3D stack

Hi, I am using Trackmate to detect the position of particles in a 3D stack (xyz). I would like to export a stack with the particles detected by TrackMate, with the same exact visualization (in particular Spot colours and Limit Drawing Depth). When I try to use Capture Overlay, to export the stack+overlay, it only takes one frame out of the whole stack. Similarly, if I duplicate the stack, I see the copied stack with the correct overlay (different in each slice), but when I try to use Flatten, it only draws the overlay of the first slice on the whole stack. Am I overlooking something?