I sometimes have a similar experience, and when I do, it is almost always simply an effect of my own standards of competence being higher than those around me.

Imagine, some sort of problem arises in the presence of a small group. The members of that group look at each other, and whoever signals the most confidence gets first crack at the problem. But this more-confident person then does not reveal any knowledge or skill that the others do not possess, because said confidence was entirely do to higher willingness to potentially make the problem worse through trial and error.

So, in this scenario, feeling less competent does not mean you are less competent; it means you are more risk-adverse. Do you have a generalized paralyzing fear of making the problem worse? If so, welcome to the club. If not, nevermind.