Do not ignore it. If accessible, fix the mechanical joint and seal correctly. If access is blocked or rework affects other trades, document it and bring it to the foreman.
Ask whether to fix now or create a correction item
Ask foreman
In Rectangular Duct Assembly: S-and-Drive, I’m looking at: What do I do when I find a bad S-and-drive joint above ceiling? What should I verify before I cut, drill, seal, cover, move, or install?