Missing commits triggering first build

Scenario 1

Reproducing the issue

1. create a repository in Stash
2. commit something to the repository created

   echo "hello world" >> greeting.txt
   git add greeting.txt
   git commit -m "add greeting"
   git push origin master 
   

3. create a project/plan in Bamboo and add a repository (Stash) to it
   Under Plan configuration settings Stash repository triggers the build when changes are committed is selected and automatic branch is enabled
4. build runs automatically

Scenario 2

Reproducing the issue

1. create a repository in Stash
2. commit something to the repository created

   echo "hello world" >> greeting.txt
   git add greeting.txt
   git commit -m "add greeting"
   git push origin master 
   

3. create a project/plan in Bamboo without adding a repository to it
4. go to Plan configuration >> Repositories and link a repository from Stash to this plan just created.
   Application link between Bamboo and Stash are configured (OAuth) correclty
5. enable the plan
   Stash repository triggers the build when changes are committed is selected and automatic branch is enabled
6. commit something to your repository
7. build does not gets trigger. It is required to trigger the build manually at first.

Result

In both scenario (Scenario 1 and Scenario 2) the commit "add greeting" is not visible under the "Commits" tab.

The presented has been tested with the following Atlassian products:

• Stash 3.2.2 and Bamboo 5.6.0
• Stash 3.2.2 and Bamboo 5.6.2
• Stash 3.3.2 and Bamboo 5.6.0
• Stash 3.3.2 and Bamboo 5.6.2