I work on web development but this week a colleague of mine entrusted me to do some devops work. He'd shown me how a couple of things work and what should I do if someone asked me to do them. He also informed people that he was going to be away so if they needed something they could come to me.
However, as the week starts, no one seems to bother to ask me anything and ignores my presence completely. For a moment I thought everything was fine, but as I soon learnt from him messaging me, people keep constantly bothering him. He started asking me why I'm not doing anything about it, until finally a colleague appears and simply demands me to hand over the document we built together.
Should I be worried about this sort of behaviour or should I have done something differently?