Of course this should work with élastique, and there is obviously a bug specific to that algorithm, especially since the quantizing is visually correct.
But don’t be afraid to use the standard algorithms just because they are named like that, the “standard-drums” sounds miles better than the “élastique-time” that is pre-set on the audio I received from you for instance.
edit I suggest that you remove [SOLVED] from the title and add “… using élastique” for clarification.
/A