Collab pushes empty commit : No changes to show for this revision.

Hello there, I'm using preview-17 2.0.0 of the Collab package.

Today, I had two modified files to push, so I described my two staged files to commit then click publish.

After Collab has finished, it returned to the same state with the blue arrow and the two files that I'm supposed to have pushed one second ago ^^

If I check the Collab timeline on the website, I can see two empty push, it worked on the third attempt!

On the following screenshot you can see that there are three push with the same description "Update world-01-level-08" (more or less the same) but on the right column the "File Changes" tell us that "No changes to show for this revision." ...



The file were uploaded by Collab on the third attempt.
What we or Collab did wrong ?

Thanks!