What I sometimes do to avoid this situation is click near the end of the midi drums track (or you could pick a different midi track), then click on the Piano Roll icon to open the end of this midi track in the Piano Roll view. Grab the end of, say, the last symbol hit, and drag it out an extra measure or two to extend it's sustain duration. This will force the song to play a couple of measures longer when rendering, and will catch the rest of your fade.

Terry

BIAB/RB 2018 PlusPak. Dell Inspiron23 running Win10, 12GB RAM, 2.5GHz i7, Presonus AudioBox USB interface.