• Too busy all the time
• S/he starts contradicting herself day to day.
• There is all talk and no action.
• She doesn’t have the time to check in and ask how to help; or she has too much time and keeps changing the story of what’s important.
• The asking is replaced with telling.
• They end the conversation with acknowledging open issues.
• I am afraid of bringing him news because I know he will not like it.
• They don’t follow-up on action items we identified (team, 1:1, or hallway meeting).
• They stop asking questions.
• Her messages and manner become inconsistent.
• They stop coming out of their office.
• Staff members start getting thrown under the bus.
• His calendar is full of weekly project meetings with no time blocked for 1:1s or other work.
• They have a new opinion after every meeting they attend.
• Every new thing becomes the highest priority.
• Communication becomes limited to terse tactical directives.
• He asks me questions that indicate he doesn’t know what I do.
• Becomes insecure and creates conspiracies.
• They don’t ask about what team members are trying to learn/get better at.

(Sourced via the fine humans on Twitter.)