RB --> Engine: Beatgrid not exporting correctly

I’m using RB to analyze tracks with variable beatgrid. It works well. Also, export to Lexicon works fine - the beatgrids are transfered flawlessly.

However when I export to Engine, the initial BPM is set as BPM for the whole track, none of the variations are preserved. Am I doing something wrong?

I don’t think Engine supports that in the same way RB and Lexicon do.