Saniderm slipping on its own?

Hello! Just got my first tattoo over the weekend. Did the cleanup steps as required yesterday and replaced the saniderm (or whatever brand I was given that's similar) after letting the tattoo dry. Today, I noticed some of the stickiness of the saniderm is already slipping. Taped it back in place for now just so it sticks, but is this something to be concerned about? My tattoo artist told me to keep it on for 4 days, but I don't know if it'll last that long or not as is.

For what it's worth, it does seem the tattoo is healing fine as far as I can tell? Didn't have much in the way of blood or plasma when I replaced the saniderm yesterday.