I used to keep a tally of how many people asked me if I was a robot when I worked at a call center. Every time someone asked the conversation basically followed the bullet points you laid out lol. The company did also use my voice for the intro/directory, so that probably didn’t help.

Before then I worked at Disney and they filmed/recorded me a couple of times for international training videos and the like. I’ve always spoken clearly and enunciated properly ¯\_(ツ)_/¯