This has been coming across in various ways:
Lack of confidence in putting themselves forward for promotions or new roles that are a step up for them in their career path
Putting themselves forward but being told they don’t have what it takes, even though they do
Being overlooked for promotion
Not being able to speak up about the work they are doing and good at in an articulate and concise way
Lack of engagement in day to day role, not sure what difference they are making in the world
Just going through the motions, disengaged with the organisation
Lack of motivation and productivity