capi:text-input-range does not survive hiding in LWW4.4

Hello lispworkers,

Please test the following in LWW4.4:

(setq tir (capi:contain (make-instance
                         'capi:text-input-range)))
(capi:apply-in-pane-process tir 'capi:hide-pane tir)
(capi:apply-in-pane-process tir 'capi:show-pane tir)
(capi:apply-in-pane-process tir 'capi:set-pane-focus tir)

I observe the following:
(1) The up and down buttons do not hide.
(2) The text part is not shown afterwards.
--
Sincerely,
Dmitri Ivanov
lisp.ystok.ru