Should my Invisalign tray be touching/flush with my gums on every tooth? (Photo)

I am on my second tray and one part on my front tooth tray is is not flush with my gum at the top. Is this normal or should I contact my orthodontist? It is right against all of my other teeth, but the top of my front tooth tray seems to not be touching the gum. My lip sometimes catches on. Picture provided.