Transporters work by de-assembling something (e.g. you) and re-assembling it somewhere else. What if, when you’re dis-assembled, you die, and the re-assembled version of you is essentially a copy? Then every time someone steps onto a transporter, their final thought before death is that they’ll end up beamed somewhere else. And the re-assembled version (copy) just thinks that everything went fine and continues on like nothing bad happened.
There’s also a Ship of Theseus thing going on here since your cells are constantly being replaced by new cells. At what point do you stop being you and are simply the train of thought that carried over from your old cells?