No idea what's going on with her tail, since we're not seeing it, but I'd also ask your vet about doing diluted Betadine soaks of the tail tip (& only the tail tip). If there's any break in the skin whatsoever, I'd assume that could be helpful, & do no harm, but personally, I still call & ask for their opinion.
At some point in the future, you may find that when she sheds, she may "lose" that tail tip along with the rest of the shed that is supposed to come off, so if I were you, I'd also ask the vet "what if that happens" so that you can be prepared if it occurs at a bad time for contacting them- this way you'll already know what to do to be of help (& even if they don't think you should bother with soaks right now). Snakes in the wild sometimes lose tail tips too- & while they can heal over okay, there's always some risk of infection that's better to avoid when they're our pets.
Corn snakes have such tiny tail tips & thin skin to go with it, so they can be prone to this issue. Just something to watch for. When you look at her sheds from now on, hold them up to the light & look very close- magnify if you need to- the tail tip of the shed may look like it didn't come off, because sometimes the very end is inside out so that the end of the shed appears to be blunt (& missing some) when it's not.