Ellipsis expansion of list doesn't work in syntax-rules

[trb-a]

In SFRI-46:
(define-syntax fake-begin
(syntax-rules ()
((fake-begin ?body ... ?tail)
(let* ((ignored ?body) ...) ?tail))))
(fake-begin
(DISPLAY "Hello"))

fake-begin should work like begin, but this throws syntax-error.

EXPECTED OUTCOME
displays "hello".

ACTUAL OUTCOME
throws syntax-error.

ENVIRONMENT
Cumalis Lisp Version 0.6.0
Chrome Version 92 on Windows 10

[trb-a]

R7RS-small section 4.3 doesn't define this behavior clearly, but 7.3 is using this.