Hi HappyLife
Version 8.23.
It seems that if you reverse a normal speed clip (100%) clip it previews OK but the export stops at 99.5%
Also changing the speed to 50% and reversing the export stops it at 49.5% (Hmmmm 1/2 -_-)
Not only that as if you a change of speed to a reversed clip the export shows a still frame for the duration of the speed change.(or part of it.)
Also, changing speed to 200% and then reversing shows a black window (not 16:9 )for Sequence Preview.
I have reported this . The latest version may have been fixed.
Nat