Why does a male coworker say things or give me advice in a mumbling tone and then walk away quickly so I can't reply and have a convo with him?

? I wanted to talk with him but he makes it hard. Lately he gives one word answers if I make small talk
Why does a male coworker say things or give me advice in a mumbling tone and then walk away quickly so I can't reply and have a convo with him?
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