Yes, this is common, I taught this in college Organizational Behavior class. The best thing a speaker, facilitator, and leader can do is ask for thoughts & and ideas. Wait a bit, then propose a naysayer’s response. Have others take different angles.

Break the ice for them. I class I used to publicly reward students who would come forth with a stupid question or disagree with me or their text. Those rewards spoke volumes in authorization to own one’s truth.

Try it out. Get used to how it feels to stand out and stand up. Then notice how that gives others the gumption to chime in authentically — and then the group can get down to some productive work!