Removing blockers you do not control, protecting the team, and resolving intra-team conflict.
3 questions in Agile, Scrum & Delivery.
Price the delay in developer-days from the board's own timestamps, then escalate with a specific ask, an owner and a date rather than a complaint. Decide honestly whether this is an impediment somebody can remove or a constraint to design around, and watch for the workaround that hides the cost.
Treat four misses as data about the system rather than a verdict on the team: find out whether the goal is set by the team or handed to it, whether unplanned work arrives mid-sprint, and whether done is being deferred, then fix the cause you find instead of shrinking the commitment.
Separate the technical disagreement from the interpersonal one, since only the first belongs in the open. Speak to each privately about specific observed behaviour and its effect, look for a structural cause such as unclear ownership, and escalate when it becomes conduct or performance.