Bug in dhcpv6 pd pool

Bug in dhcpv6 pd pool

I’m having difficulty with the dhcpv6 pd pool.

I configured a / 48 pool with Prefix Length in / 56 (I also did with / 64).

I configured the pppoe server correctly.

Everything works normally when the first user authenticates on pppoe. The dhcpv6 pd pool assigns the first / 56 block.

When next user authenticates in pppoe or dhcpv6 pd pool assigns the same prefix already assigned to the first user. (Preventing the first non-access pppoe user).

Conclude that the dhcpv6 pd pool is not breaking the / 48 block on / 56 or / 64.

I would like to know if it is Mikrotik failure or configuration error.

I used version 6.39.1

thank you