ipv6-update adds 1 to the static IPv6 DNS-name's address if it ends in even number about routeros-scripts HOT 6 CLOSED

I have not seen this... Will try to reproduce later today.
Can you please give exact commands to create the DNS records?

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BTW... I did not test my scripts with RouterOS 7.x at all... Possibly they broke arithmetics with IPv6 addresses? I will check.

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Re-tested with 6.48.2 and got same result. And figured it out. This one doesn't get prefix, but IPv6-address of interface:
:local Prefix [ / ipv6 address get [ find where interface=($Comment->"interface") from-pool=$Pool global ] address ];

If interface's address is smth else than :: then it's OR-ed to the static address. I had ::1, which explains +1:

Let's test:
/ipv6 address add address=::100 from-pool=isp interface=bridge
/ip dns static add address=::2 comment="isp-pool-isp, interface=bridge" name=test.test ttl=15m;
/ipv6 dhcp-client disable ether1
/ipv6 dhcp-client enable ether1

With added logging:
:log info ($Prefix);
:set Prefix [ :toip6 [ :pick $Prefix 0 [ :find $Prefix "/64" ] ] ];
:log info ($Prefix);
:log info ("Address is: ". ($RecordVal->"address"));
:local Address ($Prefix | ([ :toip6 ($RecordVal->"address") ] & ::ffff:ffff:ffff:ffff));
:log info ("Updating DNS record for " . ($RecordVal->"name") . ($RecordVal->"regexp") . " to " . $Address);

Creates output:
21:53:29 system,info static dns entry added by admin
21:53:34 system,info DHCPv6 client on ether1 changed by admin
21:53:36 system,info DHCPv6 client on ether1 changed by admin
21:53:37 script,info Updating IPv6 address list with new IPv6 prefix 2001:7d0:87c6:7b00::/56
21:53:37 system,info address list entry changed by admin
21:53:39 script,info 2001:7d0:87c6:7b00::100/64
21:53:39 script,info 2001:7d0:87c6:7b00::100
21:53:39 script,info Address is: ::2
21:53:39 script,info Updating DNS record for test.test to 2001:7d0:87c6:7b00::102

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Ah, got it... Can you please test?

/ system script set comment="url-suffix=\?h=next" ipv6-update
$ScriptInstallUpdate

Also fix the address in dns record, then disable and re-enable.

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Already merged to main branch... Please complain if your issue remains.
... and leave a star if you have not.

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Thanks, works now as expected!

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