I would add one step to your process. Just to make sure we are thinking about the same, this is what I would suggest:

• Do the internal retro with your team
• Agree on a process with the managers to approach members of the team
• Speak to each manager individually about the importance of addressing this situation and the process you create

I would add one step to your process. Just to make sure we are thinking about the same, these are the 3 steps I have in mind:

• Do the internal retro with your team
• Agree on a process with the managers to approach members of the team
• Speak to each manager individually about the importance of addressing this situation and the process you create