Bug: unstable comment between attributes

[ceastlund]

Describe the bug
If I run ocamlformat on the following file...

module M = struct
  type t
  [@@immediate]
  (* ______________________________________ *)
  [@@deriving variants, sexp_of]
end

...I get the following error:

ocamlformat: Cannot process "app/apply-style/feedback/comment_between_attributes.ml".
  Please report this bug at https://github.com/ocaml-ppx/ocamlformat/issues.
  BUG: formatting did not stabilize after 10 iterations.

How to Reproduce
This is using ocamlformat built from 63e1d3a, using the flags --profile=janestreet --enable-outside-detected-project --disable-conf-files.