`xref-go-back` doesn't go to the first invocation position.

I'm using eglot which uses the built-in function `xref-find-definition` for find definition functionality. When I have to jump back to the previous position I can use `xref-go-back` but when I use it for the first time it doesn't record the first position where `xref-find-definition` was used and I have to use `pop-global-mark`. Am I using it wrong or is there any bug that I am unaware of?

What is `xref-go-back`? I see no such function in Emacs.

I'm using emacs 28.1 I think in previous versions of emacs it was `xref-pop-marker-stack`

emacs 28.2 help: >xref-go-back is an interactive native-compiled Lisp function in ‘xref.el’. It is bound to M-,. Go back to the previous position in xref history. To undo, use C-M-,.

I think this is Emacs 29, because there was no `xref-go-back` in Emacs 28. Or maybe you are using an updated `xref` from ELPA, not the one that shipped with Emacs 28.

If this is what you see with `M-,`, report a bug with all the details, preferably with a recipe starting from `emacs -Q`. It works for me, FWIW.

It works, but when I use `M-,` for the first time it says `At the start of xref history`

Which means you didn't yet use `M-.`, and the stack of saved positions is empty.

That's what the bug is - the first time I use `M-.` emacs doesn't save the position.

Then please report this as a bug with the recipe to reproduce it. It "works for me".