Problem summary: 
I’m using drone CI, connected to gitlab via webhooks.
My CI webhook often triggers involontarily.
My goal 
:
Execute drone pipeline only when a merge request is created / updated with new code.
What I’ve done 
setup gitlab webhook trigger to merge request event (cf attached screenshot)
Why it does not work 
the pipeline trigger too often ! when a colleague adds a new comment into the merge request, approve it, or resolve one of its comment thread, the pipeline is triggered involuntarily.
How to achieve my goal ?