I have gotten a lot of comments that are then erased and I dont know what is going on?

I dont know how to explain this exactly. I've been writting a Star wars fic and aside from the usual comments I get, I have been getting a lot of weird comments , 80% from guest and 20% from users on AO3.

I receive alerts of them on my email were they mostly praise the story which is fine and nothing weird however when I go to my profile on AO3, they are deleted. In a third of this types of comments they put their contact information or request my own saying they either want to ''discuss something'' or they have ''ideas'' or offer to make ''fan art''.

It would not mean anything if was one or two times but it's more than 10 times and on the two times I reached to them (out of curiosity) they either offered to make fan art and requested pay for it and on the other case the person (bot??) say they had ideas for the fic but that they were busy and if I could write them later.

In none of my fics I have ever requested or make a claim about being interest about a fanart for the fic and while I usually put something like comments are love /feel free to sugest ideas, I have been writing extensively in other fandoms and this is the first time something like those weird erased comments happen. This is happening only with one of my fics and I have 20 in total.

Any ideas? Has the same thing happened to anyone else?

EDIT: these erased comments actually describe some parts of the fic and the (supposed ) opinion of the user/guest or actually made a good summary of what parts supposedly they liked the most and why.