This is indeed fixed in the development version but I found it had crept into another as yet unreleased file, so your report was helpful.
If you first install the package manager 'straight' (install it as a regular Emacs package together with the 'use-package' package), then you ought to be able to load Hyperbole straight from the development source with:
(use-package hyperbole
:straight t
:config
(hyperbole-mode 1)
:bind* ("<M-return>" . hkey-either)) ;; Makes Action Key work in Org mode.
Regards,
Bob