While testing the: https://h5p.org/column#example=34129
I notice the ‘Column’ library issues completion event every time you interact with ‘Drag and Drop’ — provided this is the last activity you interact with (going from top to bottom).
If the ‘Drag and Drop’ is NOT a last activity (e.g., going from bottom to top) the issue is not present.
Library name: Column
Library version: 1.12.0
Fix could be at h5p-column.js
commit: ad8f0f4 in trackScoring function definition,