I use Swan filter tips also, the slim ones. Problem is they don't react with super glue the way that actual cigarrette filters do, and consequently don't work so well.
However, I've done a bit of experimenting and UHU liquid super glue works well with Swan filters.
Be careful tho' it's nasty stuff I accidentally spilt some on my jeans... an exothermic reaction occurred and if I hadn't pealed my jeans away I'd have been burned.
The reaction is a bit delayed tho'. Don't get caught out by looking closely to see if it's smoking you'll gas yourself 🤪
And yes it's safe, once the glue has gone off the result is as hard as concrete and pretty much inert.