Router on a stick IPv6

PPPoE interface and Ethernet interface in a physical interface to form Router on a stick, using IPv6 to connect to the web page does not work properly, except for IPv6 srcnat masquerade

#enable srcnat
Test-Connection example.com -IPv6

   Destination: example.com

Ping Source           Address                   Latency BufferSize Status
                                                   (ms)        (B)
---- ------           -------                   ------- ---------- ------
   1 tuf              2606:2800:21f:cb07:6820:…     234         32 Success
   2 tuf              2606:2800:21f:cb07:6820:…     227         32 Success
   3 tuf              2606:2800:21f:cb07:6820:…     195         32 Success
   4 tuf              2606:2800:21f:cb07:6820:…     187         32 Success

* Host example.com:443 was resolved.
* IPv6: 2606:2800:21f:cb07:6820:80da:af6b:8b2c
* IPv4: (none)
*   Trying [2606:2800:21f:cb07:6820:80da:af6b:8b2c]:443...
* Name '****:****:****:****:756c:ad83:191a:adf9' family 23 resolved to '****:****:****:****:756c:ad83:191a:adf9' family 23
* Local port: 0
* Connected to example.com (2606:2800:21f:cb07:6820:80da:af6b:8b2c) port 443
* schannel: disabled automatic use of client certificate
* ALPN: curl offers http/1.1
* ALPN: server accepted http/1.1
* using HTTP/1.x
> GET / HTTP/1.1
> Host: example.com
> User-Agent: curl/8.7.1
> Accept: */*
>
* Request completely sent off
* schannel: remote party requests renegotiation
* schannel: renegotiating SSL/TLS connection
* schannel: SSL/TLS connection renegotiated
* schannel: remote party requests renegotiation
* schannel: renegotiating SSL/TLS connection
* schannel: SSL/TLS connection renegotiated
< HTTP/1.1 200 OK
< Accept-Ranges: bytes
< Age: 387005
< Cache-Control: max-age=604800
< Content-Type: text/html; charset=UTF-8
< Date: Tue, 06 Aug 2024 06:12:56 GMT
< Etag: "3147526947"
< Expires: Tue, 13 Aug 2024 06:12:56 GMT
< Last-Modified: Thu, 17 Oct 2019 07:18:26 GMT
< Server: ECAcc (lac/55B4)
< Vary: Accept-Encoding
< X-Cache: HIT
< Content-Length: 1256
<
{ [1256 bytes data]
* Connection #0 to host example.com left intact
############################################################################################
#disable srcnat
 Test-Connection example.com -IPv6

   Destination: example.com

Ping Source           Address                   Latency BufferSize Status
                                                   (ms)        (B)
---- ------           -------                   ------- ---------- ------
   1 tuf              2606:2800:21f:cb07:6820:…     234         32 Success
   2 tuf              2606:2800:21f:cb07:6820:…     227         32 Success
   3 tuf              2606:2800:21f:cb07:6820:…     195         32 Success
   4 tuf              2606:2800:21f:cb07:6820:…     187         32 Success
   
* Host example.com:443 was resolved.
* IPv6: 2606:2800:21f:cb07:6820:80da:af6b:8b2c
* IPv4: (none)
*   Trying [2606:2800:21f:cb07:6820:80da:af6b:8b2c]:443...
* Name '****:****:****:****:756c:ad83:191a:adf9' family 23 resolved to '****:****:****:****:756c:ad83:191a:adf9' family 23
* Local port: 0
* Connected to example.com (2606:2800:21f:cb07:6820:80da:af6b:8b2c) port 443
* schannel: disabled automatic use of client certificate
* ALPN: curl offers http/1.1
* ALPN: server accepted http/1.1
* using HTTP/1.x
> GET / HTTP/1.1
> Host: example.com
> User-Agent: curl/8.7.1
> Accept: */*
>
* Request completely sent off
* schannel: server closed abruptly (missing close_notify)
* Closing connection
* schannel: shutting down SSL/TLS connection with example.com port 443