Attemp to display deleted buffer.

[madper]

Howdy, When I am using multi-vterm with several vterminal buffers and trying to switch to next / priv one I get error message Attemp to disply deleted buffer even I have three *vterminal*<_> buffer. E.g.:

ELISP> (seq-filter (apply-partially #'string-match-p "vterminal") (mapcar #'buffer-name (buffer-list)))
("*vterminal<3>*" "*vterminal<1>*" "*vterminal<2>*")
ELISP> (mapcar #'buffer-name multi-vterm-buffer-list)
(nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil "*vterminal<2>*" nil "*vterminal<3>*")

as you can see, there is no vterminal<1> in multi-vterm-buffer-list. And I can't use multi-vterm-next when working at vterminal<2> even though there is third vterminal.

BR, Chengjun