[aqueueaqueue]

That is an interesting scenario, I am glad they shared it.

Not sure if the problem is fixed though. What are the reasons for thinking the bug was no big deal. It may be hard to get the truth. Some people lie because they need a job and want to keep it. Maybe he has an KPI he needs to keep. Closing the bug as no issue would help a feature based KPI or OKR.

Also need to address culture. It should be like a "door desk" (Infamous Amazon cultural thing!) level thing that quality is first.

You delay the feature work to ensure quality and investigate bugs. Their manager accepts a feature slips because the team fixes bugs.

Not all bugs (you need triage) but definitely the ones that cause real issues for customers. Someone (QA and dev together) do an impact assessment. Understand how bad that bug is.