[ISSUE] Audio -> Close gaps (time stretch) issue/efficiency

So can this be classified as a bug then and have a comment from Steinberg that they took notice and that it will be fixed? I have 12 songs of live drums to quantize and I don’t want to spend 2 hours on each track waiting for the close gaps function to finish.

The issue is easily reproducible.
On a project with lets say 10 tracks of live drums all lined up, create hitpoints on the kick and snare tracks and slice all the tracks on the quantize panel, quantize the tracks on 16th notes and then do audio->advanced->close gaps (time stretch).
It takes ages to complete and CPU usage is very low.