Hi, I use tcl8.6.12 and the "superclass new" is not called → why

oo::class create MkObjectRpc {
superclass oo::class
# root
variable hdl
}

oo::class create Sq3LiteRpc {
superclass MkObjectRpc
variable hdl
}

# superclass "new"
oo::define MkObjectRpc self method new { rpc args } {
CUM
set cls [self class]
# call: Sq3Litenew
if {[lindex $args 0] eq {-hdl}} {
set mqHdl [lindex $args 1]
} else {
set mqHdl [[info obj namespace $cls]::my CTOR $rpc {*}$args]
}
next $rpc $mqHdl
}

# class "new"
oo::define Sq3LiteRpc self method new { rpc args } {
CUM
cmd self call
# call: Sq3Litenew
next $rpc {*}$args → expect to call "MkObjectRpc self method new"
}

test:

> Sq3LiteRpc new $rpc :memory:

"Sq3LiteRpc self method new" is called → OK

:Sq3LiteRpc::new -> CUM -> rpc<::oo::Obj41> , args<:memory:>
[self call] = {{method new object method} {method new ::oo::class {core method: "new"}}} 0

BUT !! " MkObjectRpc self method new" is NOT called ?? → why ?

the same code with: "nextto MkObjectRpc $rpc {*}$args" in "Sq3LiteRpc self method new" create

method has no non-filter implementation by "MkObjectRpc"
while executing
"nextto MkObjectRpc $rpc {*}$args"
(object "::Sq3LiteRpc" method "new" line 5)
invoked from within
"Sq3LiteRpc new $FH($F) :memory: "
("uplevel" body line 1)
invoked from within
"uplevel 1 $script"

mfg ao.